Question

220 articles droped in a water tank which is 52 m long and 47 m broad. If the average displacement of water by an article is 4.5 m3 , then approximate rise in the water level will be:
1. 40.5 cm
2. 20.5 cm
3. 12.5 cm
4. 30.5 cm

Answer 1

Correct Answer - Option 1 : 40.5 cm

Given:

Number of articles = 220 articles

The average displacement of water by an article = 4.5 m

Water tank Dimensions, 52 m long and 47 m broad

Calculations:

Let the width of tank = b meter

Total Displacement = 220 × 4.5 = 990 m³

According to question,

990 = 52 × 47 × w

w = 990/(52 × 47)

w = 0.405 m

w = 40.5 cm

∴ The approximate rise in the water level is 40.5 cm.