The figure not drawn to scale shows a cubical tank which is
19 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 12 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 -
19 =
89 Volume of water needed to fill the tank to the brim
=
89 x 210 x 210 x 210
= 8232000 mℓ
1000 mℓ = 1 ℓ
8232000 ÷ 1000 = 8232 ℓ
(b)
Time needed to fill the tank completely
= 8232 ÷ 12
= 686 min
60 min = 1 h
686 min = 11 h 26 min
Answer(s): (a) 8232 ℓ; (b) 11 h 26 min