The figure not drawn to scale shows a cubical tank which is
38 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 5 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 -
38 =
58 Volume of water needed to fill the tank to the brim
=
58 x 140 x 140 x 140
= 1715000 mℓ
1000 mℓ = 1 ℓ
1715000 ÷ 1000 = 1715 ℓ
(b)
Time needed to fill the tank completely
= 1715 ÷ 5
= 343 min
60 min = 1 h
343 min = 5 h 43 min
Answer(s): (a) 1715 ℓ; (b) 5 h 43 min