Question

Water in a canal 1.5m wide and 6m deep is flowering with a speed of 10km/ hr. how much area will it irrigate in 30 minutes if 8cm of standing water is desired?

Answer 1

Given that water is flowering with a speed = 10km / hr.

In 30 minutes length of flowering standing water = 10 x `30/60km`

= 5km = 5000m.

Volume of flowering water in 30 minutes

V = 5000 x width x xdepth m³

Given width of canal = 1.5m

Depth of canal = 6m

V = 5000 x 1.5 x 6m³

V = 45000m³

Irrigating area in 30 minutes if 8cm of standing water is desired = `45000/0.08`

=`45000/0.08` = 562500m²

∴ Irrigated area in 30minutes = 562500m²