The figure not drawn to scale shows a cubical tank which is
14 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 4 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 -
14 =
34 Volume of water needed to fill the tank to the brim
=
34 x 160 x 160 x 160
= 3072000 mℓ
1000 mℓ = 1 ℓ
3072000 ÷ 1000 = 3072 ℓ
(b)
Time needed to fill the tank completely
= 3072 ÷ 4
= 768 min
60 min = 1 h
768 min = 12 h 48 min
Answer(s): (a) 3072 ℓ; (b) 12 h 48 min