A swimming pool is 25 m long and 18 m broad. When a number of men dive into the pool, the height of the water rises by 1 cm. If the average amount of water displaced by one of the men be 0.1 cubic meter, how many men are there in the pool?

Question: A swimming pool is 25 m long and 18 m broad. When a number of men dive into the pool, the height of the water rises by 1 cm. If the average amount of water displaced by one of the men be 0.1 cubic meter, how many men are there in the pool?

Solution:
Volume of water displaced= 25 × 18 × (1/100) m³ = 9/2 m³
Volume of water displaced by 1 man = 0.1m³
∴ Number of men are in the pool = (9/2)/0.1 = (9 × 10)/2 = 45 [0.1 m = 10 cm]