Water in canal 3m wide and 1.2m deep flowing with a speed of 10 km/hr. How much area will it irrigate in 30 minutes, if 8cm of standing water is required?
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Answer:
225000 m²
Step-by-step explanation:
Depth = 1.2m
width = 3m
flow velocity = 10km/h = 10,000 m/h
time = 30minute = 0.5 hour
standing water required = 8cm = 0.08m
Let the area = A m²
Volume of water will be same
1.2m × 3m × 10,000 m/h × 0.5 h = A × 0.08
⇒ A = 18000/0.08
⇒ A = 225000 m²
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