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 18 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 270 x 270 x 270
= 17496000 mℓ
1000 mℓ = 1 ℓ
17496000 ÷ 1000 = 17496 ℓ
(b)
Time needed to fill the tank completely
= 17496 ÷ 18
= 972 min
60 min = 1 h
972 min = 16 h 12 min
Answer(s): (a) 17496 ℓ; (b) 16 h 12 min