The figure not drawn to scale shows a cubical tank which is
13 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 15 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 -
13 =
23 Volume of water needed to fill the tank to the brim
=
23 x 150 x 150 x 150
= 2250000 mℓ
1000 mℓ = 1 ℓ
2250000 ÷ 1000 = 2250 ℓ
(b)
Time needed to fill the tank completely
= 2250 ÷ 15
= 150 min
60 min = 1 h
150 min = 2 h 30 min
Answer(s): (a) 2250 ℓ; (b) 2 h 30 min