Water in a canal, 5.4 m wide and 1.8 m deep, is flowing with a speed of 25 km/hour

Mensuration (10)

Water in a canal, 5.4 m wide and 1.8 m deep, is flowing with a speed of 25 km/hour. How much area can it irrigate in 40 minutes, if 10 cm of standing water is required for irrigation ?

Answer

Volume of water flowing in 40 min = 5.4 x 1.8 x 25000 x 40/60 m³

= 162000 m³ 

Height of standing water = 10 cm = 0.10 m 

Area to be irrigated = 162000/0.10

= 1620000 m²

• Exam Year: 2017