Question

Here is an empty pool in the shape of a cuboid.
The width of the pool is $3m$
The length of the pool is $12m$
The top of the pool is $2.5m$ above the base of the pool.
jeb is goining to put water in the pool.
The level of the surface of the water will be $60cm$ below the top of the pool.
Water flows into the pool at $400litres$ per minute
$1m^3=1000liters$
How long will it take to fill to pool to $60cm$ below the top of the pool?
Given answer in hours and miuntes.

Answer 1

Let the time taken be $x$ minutes

then,

volume of water filled in pool = volume of water flowed in $x$ minutes

$12\times 3(2.5-\frac{600}{100})=\frac{400}{1000}\times x$

$36\times \frac{1.9}{10}=\frac{4}{10}\times x$

$x=171$

So, time taken $171minutes=2hrs51minutes$