Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
#1 Re: Help Me ! » Dimensio of a box » 2009-02-14 17:44:42
thanks for the answers JurassicPlank4 and to you JaneFairfax, i just realized my mistake, for how I became so independent asking questions here in this forum but in fact I should be the most capable of getting those because those were just a review given to us. You know what ive just arrive to some of those answers, i gave my myself a shot, then i got it! hehe.. Godbless you all
#2 Help Me ! » inverted right circular cone » 2009-02-13 19:40:32
- MoyMarian
- Replies: 2
A water tank is in the form of an inverted right circular cone with a base diamter 5 meters and slant height 6 meters .Find the volume of water it contains when
a. it is full
b. filled to a depth of 3 meters.
#3 Help Me ! » Right Circular Cone II » 2009-02-13 19:39:22
- MoyMarian
- Replies: 3
A right circular cone of slant height 20cm has a radius of 8cm. Find the angle of the sector of a circle of radius 20cm whose area is equal to the lateral area of the cone.
#4 Help Me ! » Cone II » 2009-02-13 19:38:11
- MoyMarian
- Replies: 2
A cone of altitude h is to be cut into three parts of equal weight. How far from the vertex must the cuts parallel to the base be made?
#5 Help Me ! » Cardboard » 2009-02-13 19:37:01
- MoyMarian
- Replies: 1
A piece of cardboard in the form of a sector of a circle of radius 25cm is rolled into a cone. Calcualte the volume of the cone if the angle of the sector is 60°?
#6 Help Me ! » Height » 2009-02-13 19:35:40
- MoyMarian
- Replies: 2
If a man 1.68 meters tall in height weights 60kg, what woould be the weight of his son 1.25 tall of the same proportion?
#7 Help Me ! » Right Circular Cone » 2009-02-13 19:34:35
- MoyMarian
- Replies: 1
what is the volume of the right circular cone that can be formed using as its lateral surface the semicircular area.
#8 Help Me ! » Cone » 2009-02-13 19:33:20
- MoyMarian
- Replies: 1
The crater of a volcano is approximately in the shape of a cone of base area 2km². If the creater's depth is 1km, what volume if the filling materials would be required to fill his cavity?
#9 Help Me ! » Pyramid » 2009-02-13 19:32:03
- MoyMarian
- Replies: 1
A pyramid whose altitude is 4 meters, weighs 100kg. At what distance from its vertex must it be cut by a plane parallel to its base so that two solids of equal weight will be formed?
#10 Help Me ! » Dimensio of a box » 2009-02-13 19:30:11
- MoyMarian
- Replies: 5
The inside dimension of a box is 1 meter by 2 meters by 3 meters. Find the dimensions of a packing box of the same shape which will hold 4 times as much?
#11 Help Me ! » Regular Square Pyramid » 2009-02-13 19:27:39
- MoyMarian
- Replies: 3
Find the area of the base of regular square pyramid whose lateral faces are equilateral triangles and whose altitude is 20cm.
#12 Help Me ! » Simple Derivative » 2009-01-21 21:01:39
- MoyMarian
- Replies: 2
what is the derivative of 3^x + 2x - 1
#13 Help Me ! » Solid Mensuration XV » 2009-01-15 18:09:36
- MoyMarian
- Replies: 1
A regular tetrahedron is a triangular pyramid all of whose faces are equilateral triangles. Find the altitude h and volume of a regular tetrahedron of edge 8cm.
#14 Help Me ! » Solid Mensuration XIV » 2009-01-15 17:15:27
- MoyMarian
- Replies: 1
A plastic container is in the form of a right circular cylinder with a large conical opening. When it is filled level with the bottom of the opening, it can just be turned upside down without spilling the content. Prove that the depth of the cone is three-fifths the depth of the container.
#15 Help Me ! » Solid Mensuration XIII » 2009-01-15 16:56:30
- MoyMarian
- Replies: 1
A right circular cylinder is inscribed in a right circular cone of altitude a and base b. Find the radius of the cylinder if its lateral area is equal to the lateral area of the cone which surmounts the cylinder.
#16 Help Me ! » Solid Mensuration XII » 2009-01-15 16:54:57
- MoyMarian
- Replies: 1
find the volume of the largest pyramid that can be cut from a rectangular parallelepiped, if three of the edges of a rectangular parallelepiped that meet in a point are also the lateral edges of a pyramid.
#17 Help Me ! » Solid Mensuration XI » 2009-01-15 16:53:33
- MoyMarian
- Replies: 0
How many square meters of canvas are required for a conical tent 15m high and 10 in diameter if 15% of the material is wasted?
#18 Help Me ! » Solid Mensuration X » 2009-01-15 16:52:10
- MoyMarian
- Replies: 1
A right circular cone of slant height 20cm has a radius of 8cm. Find the angle of sector of a circle of radius 20cm and whose area is equal to the lateral area of the cone.
#19 Help Me ! » Solid Mensuration IX » 2009-01-15 16:50:12
- MoyMarian
- Replies: 0
A pile of sand is in the form of a right circular cone of altitude 4m and slant height 7m. What is the weight of the sand, of the sand weighs 50kg/m³.
#20 Help Me ! » Solid Mensuration VIII » 2009-01-15 16:49:03
- MoyMarian
- Replies: 1
A conical pile of sand 4m in height has a volume of 30 cubic meters. If the bottom of the pile is on level ground, how much ground does it cover?
#21 Help Me ! » Solid Mensuration VII » 2009-01-15 16:47:59
- MoyMarian
- Replies: 0
A water tank is constructed in the form of an inverted right circular cone(whose base diameter is 10m and altitude 6m) surmounted by a right circular cylinder (whose altitude is 8m and diameter 10m). Find the total capacity of the tank.
#22 Help Me ! » Solid Mensuration VI » 2009-01-15 16:45:07
- MoyMarian
- Replies: 0
Find the volume and total surface area of a right circular cone whose base diameter is 10cm and whose altitude is 20cm.
#23 Help Me ! » solid mensuration V » 2009-01-14 22:44:15
- MoyMarian
- Replies: 1
a water tank in the form of an inverted right circular cone is 6m high and its base radius is 2m. A similar tank is constructed whose volume is twice as large. What should be the dimensions of the larger tank?
#24 Help Me ! » solid mensuration IV » 2009-01-14 22:42:08
- MoyMarian
- Replies: 1
a cube of ice of edge 4cm melts until it becomes a cube which is one-half as heavy as the original. find the dimensions of the new cube.
#25 Help Me ! » solid mensuration III » 2009-01-14 22:40:57
- MoyMarian
- Replies: 1
a pyramid of altitude a and a square base of length of the side b is divided into three parts by two planes passed parallel to the base. If these planes are distant 1/3a and 2/3a, respectively, from the vertex, find the ratio of the volume of the middle part of the volume of the largest part.