Volume of Cube and Cuboid

Chapter 11 Class 9 Surface Areas and Volumes
Serial order wise

### Transcript

Ex 13.5, 6 A village, having a population of 4000, requires 150 litres of water per head per day. It has a tank measuring 20 m Γ 15 m Γ 6 m. For how many days will the water of this tank last? Number of days water will last = (ππππ’ππ ππ π‘πππ )/(πππ‘ππ π€ππ‘ππ ππππ’ππππ πππ πππ¦) Here, π = 20 m, b = 15 m and h = 6 m. Volume of the tank = π Γ b Γ h = (20 Γ 15 Γ6) m3 = 1800 m3 Water required per person per day = 150 litres Water required for 4000 person per day = (4000 Γ 150) litres = 4000 Γ 150 Γ (1/1000) m3 = 600 m3 Number of days water will last = (πΆππππππ‘π¦ ππ π‘πππ )/(π‘ππ‘ππ π€ππ‘ππ ππππ’ππππ πππ πππ¦) = ((1800 π3)/(600 π3)) = 30 Thus, the water will last for 30 days. Number of days water will last = (ππππ’ππ ππ π‘πππ )/(πππ‘ππ π€ππ‘ππ ππππ’ππππ πππ πππ¦) = ((1800 π3)/(600 π3)) = 3 Thus, the water will last for 3 days.