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 10 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 240 x 240 x 240
= 11520000 mℓ
1000 mℓ = 1 ℓ
11520000 ÷ 1000 = 11520 ℓ
(b)
Time needed to fill the tank completely
= 11520 ÷ 10
= 1152 min
60 min = 1 h
1152 min = 19 h 12 min
Answer(s): (a) 11520 ℓ; (b) 19 h 12 min