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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Neat work!

M#641. The ratio of parallel sides of a trapezium is 3 : 2. If the height of the trapezium is 15 cm and its area is 135 square centimeters, then find the length of the longer parallel side.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Excellent!

M#642.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Neat work!

M#643. Find the diameter of a circle whose area is equal to the sum of the area of two circles (approximately) of radius 15 cm and 22 cm.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Neat work!

M # 644. A wire is bent in the form of a square of side 12 centimeters. If it is cut and bent in the form of a circle, find the radius of the circle. Use

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

*Last edited by irspow (2021-02-27 04:57:07)*

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Neat work!

M#645. Find the percentage increase in the area of the circle if its radius is increased by 50%.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Neat work!

M#646. If the area of a circular park is 62.82 hectares. Find the total cost of fencing the park at the rate of 72 cents per meter. Use

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Remarkable!

M#647.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Excellent!

M#648. A circular wheel covers a distance of 2.5 kilometers in 240 revolutions. Find the diameter of the wheel. Use

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Neat work!

M#649. Find the volume and surface area of a room whose length, breadth, and height are 16 meters, 14 meters, and 10 meters.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Excellent!

M#650. Find the length of the longest pole (approximately) that can be put in a room of dimensions 15 m x 12 m x 6 m.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Neat work!

M#651. Four equal cubes are kept adjacent to each other in a row. Find the ratio of the surface area of the cuboid so formed and the surface area of all the four cubes taken together.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,603

Hi,

Neat work!

M#652. The length of a rectangular garden is 12 meters and its breadth is 5 meters. Find the length of the diagonal of a square garden, having the same area as that of the rectangular garden.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 880

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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