The figure not drawn to scale shows a cubical tank which is
27 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 7 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 -
27 =
57 Volume of water needed to fill the tank to the brim
=
57 x 210 x 210 x 210
= 6615000 mℓ
1000 mℓ = 1 ℓ
6615000 ÷ 1000 = 6615 ℓ
(b)
Time needed to fill the tank completely
= 6615 ÷ 7
= 945 min
60 min = 1 h
945 min = 15 h 45 min
Answer(s): (a) 6615 ℓ; (b) 15 h 45 min