Question

hey MAte...

I will mark brainiest...

Water in a Canal, 30 cm wide and 12 m deep is flowing with a velocity of 20 km per hour. How much area will it irrigate, if 9cm of standing water is desired.

Answer 1

hey mate
here's the solution

Answer 2

Given:

Width of the canal = 30 cm = 3 m

Depth of the canal = 12 m.

Given that water is flowing with a velocity of 20 km/hr.

So, the length of the water column formed in (1/2) hour = 10 km = 10000 m.

So, the volume of water flowing in (1/2) hour = (10000 * 3 * 12)

                                                                          = 360000 m^3.

Let the area to be irrigated in (1/.2) hour be 'x'.

⇒ x * (9/100) = 360000

⇒ x = 36000000/9

⇒ x = 4000000 m^2.

Therefore, the canal irrigated 4000000 m^2 (or) 4 km^2 area in (1/2) hour.

Hope it helps!