The figure not drawn to scale shows a cubical tank which is
16 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 16 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 -
16 =
56 Volume of water needed to fill the tank to the brim
=
56 x 120 x 120 x 120
= 1440000 mℓ
1000 mℓ = 1 ℓ
1440000 ÷ 1000 = 1440 ℓ
(b)
Time needed to fill the tank completely
= 1440 ÷ 16
= 90 min
60 min = 1 h
90 min = 1 h 30 min
Answer(s): (a) 1440 ℓ; (b) 1 h 30 min