Water in a canal 30dm wide and 12dm deep is flowing with a velocity of 20km/h . How much area will it irrigated in 30 m/h if 9 cm of standing water is desired ?
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depth = 12dm = 1.2m
width = 30dm = 3m
flow velocity = 20km/h = 20,000 m/h
time = 30minute = 0.5 hour
standing water required = 9cm = 0.09m
Let the area = A m²
Volume of water will be same
1.2m × 3m × 20,000 m/h × 0.5 h = A × 0.09
⇒ A = 36000/0.09
⇒ A = 4,00,000 m² = 40 hectare
40 hectare plot can be irrigated
width = 30dm = 3m
flow velocity = 20km/h = 20,000 m/h
time = 30minute = 0.5 hour
standing water required = 9cm = 0.09m
Let the area = A m²
Volume of water will be same
1.2m × 3m × 20,000 m/h × 0.5 h = A × 0.09
⇒ A = 36000/0.09
⇒ A = 4,00,000 m² = 40 hectare
40 hectare plot can be irrigated
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