Question

A village has population of 1500 people and requirement of water per head is 200 litres. Water container providing water has dimensions 15m * 25m * 12m. For how many days would the water in the container last? (1000 litres = 1m^3)

(a) 10 days

(b) 18 days

(c) 12 days

(d) 15 days

I got this question during an interview.

Question is from Volume of a Cuboid topic in chapter Surface Areas and Volumes of Mathematics – Class 9

Answer 1

Correct choice is (d) 15 days

Easiest explanation: Requirement of water of village for one day = 1500 * 200

= 300000 litres

= \(\frac{300000}{1000}\) m^3

= 300m^3

Volume of the water container = 15 * 25 * 12

= 4500m^3

Number of days for which the water in the container would last = \(\frac{Volume \,of \,the \,container}{Water \,requirement \,of \,village \,for \,one \,day} = \frac{4500}{300}\)

= 15 days.