Question

a residential colony has a population of 5400and60liters liters of water is required in per person per day. for the affection utilisation of rainwater, the construction of water reservoir measuring 48m x 27m x 25m x to collection of rainwater for how much days, the water of this take is sufficient, if burning when the height of water level is 5 m

Answer 1

Given : A residential colony has a population of 5400 and 60 litres of water is required per person per day.
So,
Total water used per day = 5400 × 60 = 324000 litre
And
Dimension of water reservoir = 48 × 27 × 25 . So Length = 48 m , Breadth = 27 m and height = 25 m

a ) As given during rain the height of water level is 5 m.
So,
Volume of water reservoir ( With height 5 as that is height of water level ) = Total water stored in water reservoir , The we get

Total water stored in water reservoir = 48 × 27 × 5 = 6345 m3
And
We know
1 m3 = 1000 litre , So

6345 m3 = 6345000 litre

SO,
That water sufficient for total days = 6345000/324000 = 235/12 = 19.58 , So
we can say that water sufficient for nearly 20 days