I have a tank which I can only partly see. It is 70cms wide, 45 cm deep and hold 500litres. How long is it?
Thanks!

Hi Alex,

If the length is x cm then the volume is 70 × 45 × x = 3150 × x cubic centimetres. A cubic centimetre is a millilitre and there are 1000 litres in a litre so the volume is 3150 × x ml = 3.150 × x litres. Since your tank has a volume of 500 litres

3.150 × x = 500

so

x = 500/3.150 = 558.7 centimeters.

Harley

Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.