The figure not drawn to scale shows a cubical tank which is
110 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 12 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 -
110 =
910 Volume of water needed to fill the tank to the brim
=
910 x 100 x 100 x 100
= 900000 mℓ
1000 mℓ = 1 ℓ
900000 ÷ 1000 = 900 ℓ
(b)
Time needed to fill the tank completely
= 900 ÷ 12
= 75 min
60 min = 1 h
75 min = 1 h 15 min
Answer(s): (a) 900 ℓ; (b) 1 h 15 min