The figure not drawn to scale shows a cubical tank which is
15 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 -
15 =
45 Volume of water needed to fill the tank to the brim
=
45 x 200 x 200 x 200
= 6400000 mℓ
1000 mℓ = 1 ℓ
6400000 ÷ 1000 = 6400 ℓ
(b)
Time needed to fill the tank completely
= 6400 ÷ 16
= 400 min
60 min = 1 h
400 min = 6 h 40 min
Answer(s): (a) 6400 ℓ; (b) 6 h 40 min