A pool of water with surface area of 0.6 ha has a uniform depth of 3m.A pipe drains the pool at the rate of 200 litres per second.

Class: Form 1

Subject: Mathematics

Topic: Rates, Ratios, Proportions and Percentages

Lesson Summary

A pool of water with surface area of 0.6 ha has a uniform depth of 3m.A pipe drains the pool at the rate of 200litres per second .How many hours does it take to empty the pool?.



Text Answer


0.6ha to M²
0.6 x 10000 = 6000M²
Volume of the pool = 6000 x depth (3M) =18000M³
18000M³ to litres = 18000 x 1000 = 18000000litres
Time =𝟏𝟖𝟎𝟎𝟎𝟎𝟎𝟎200= 90,000 seconds
90,000 seconds to hours
=90,000 ÷ 3600 = 25 hours.

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