Posted by **Charles** on Friday, August 19, 2011 at 5:22am.

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

- math -
**Damon**, Friday, August 19, 2011 at 7:20am
area * depth = volume

time = volume/volume rate

1 hectare = 1000 m^2

1 liter = 10^-3 m^3

1 hr = 3600 seconds

so

time in hours = .6hec(10^3m^2/hec)*3m/(200 L/s *1m^3/10^3 L * 3.6 *10^3 s/h)

= .6*3/(200*3.6) *10^3

= 0.5 hr

check my arithmetic

200 l/s * t =

- math -
**Angela**, Friday, September 2, 2016 at 5:51pm
0.6*10000

6000m 3*200=600

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