Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

You are not logged in.

## #1 Re: Help Me ! » Vessel Displacement » 2012-11-27 16:30:10

Thanks again for the help. I was on the right track from the beginning, but had doubts.

Cheers,

## #2 Re: Help Me ! » Vessel Displacement » 2012-11-26 23:05:39

Bob,

I think it should be:

New Draft = 160 - (W / 1.05)cm

You were correct above with subtracting the change in draft, due to the removal of weights onboard, the ship will rise causing the draft to go down.

Rise or fall (cm) = weight removed or added (tonnes) / Tonnes per Centimeter (TPC).

What do you think?

## #3 Re: Help Me ! » Vessel Displacement » 2012-11-26 21:14:08

Thanks for your help! I was on a similar path with the first part which I've been stewing over for days.

Great work on the first Draft question!

## #4 Re: Help Me ! » Number Patterns?? » 2012-11-26 19:44:48

An aptitude test for yr 10 students, got it from a TAFE Teacher.

## #5 Help Me ! » Vessel Displacement » 2012-11-26 19:04:29

whatthe
Replies: 7

Your vessel at departure from Brisbane had a draft of 1.6m and had 5,340litres of fuel, 5000 litres of fresh water and 8 passengers embarked.

Your vessel has a crew of 3 persons and uses 120 litres of fuel per hour at a speed of 16 knots and you routinely use fresh water at a rate of 1 litre per person per hour. Your destination is Sydney which is a distance of 188 nautical miles.

a) How long will you be at sea considering a constant speed
b) What will be your draft on entry to Sydney Harbour
c) What draft will the vessel have on its return to Brisbane provided the same conditions remain

Given:
Vessel Tonnes per Centimetre (TPC) in fresh water is 1.05
Specific density of sea water is 1.025
Specific density of fuel 0.78
Assume Brisbane is salt water and Sydney harbour is fresh water

## #6 Help Me ! » Number Patterns?? » 2012-05-27 17:58:11

whatthe
Replies: 9

Ive been asked to solve the following:

1,4,16,25,....,....,....any tips on the next 3 numbers.
Ive come up with 49,64,100
I could understand if there was a 9 between the 1 & 4 but it wasnt in the question.