The figure not drawn to scale shows a cubical tank which is
49 filled with water.
- What is the volume of water needed to fill up the tank to the brim?
- Water is added to the tank at a rate of 9 litres per minute. At this rate, how long will it take to fill the tank completely? Give your answer in this format. (Eg 1 h 20 min)
(a)
Fraction of water needed to fill the tank to the brim
= 1 -
49 =
59 Volume of water needed to fill the tank to the brim
=
59 x 180 x 180 x 180
= 3240000 mℓ
1000 mℓ = 1 ℓ
3240000 ÷ 1000 = 3240 ℓ
(b)
Time needed to fill the tank completely
= 3240 ÷ 9
= 360 min
60 min = 1 h
360 min = 6 h 0 min
Answer(s): (a) 3240 ℓ; (b) 6 h 0 min