# A village, having

Length of tank = l = 20 m

Breadth of tank = b = 15 m

Height of tank = h = 6 m

Volume of water in tank = volume of cuboidal tank

Volume of cuboid = lbh

volume of cuboidal tank = 20 × 15 × 6

= 1800 m3

1 m3 is 1000 litres

1800 m3 = 1800 × 1000 = 1800000 litres

150 litres of water is required per head per day and the population of village is 4000

volume of water consumed by 4000 people per day = 4000 × 150 = 600000 litres

In one day village consumes 600000 litres of water

days require to consume 1800000 litres of water = = 3

Thus water of tank will last 3 days

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