Question

- Water in a canal, 6 m wide and 1.5 m deep, is
flowing at a speed of 4 km/h. How much area
will it irrigate in 10 minutes if 8 cm of standing
water is needed for irrigation? (CBSE 2014)
AC

please answer this question​

Answer 1

Step-by-step explanation:

so, the answer is 5000m

Answer 2

Answer:

56.25 hectares

Step-by-step explanation: canal is a shape of cuboid

where

breadth=6m

height=1.5m

speed of canal =4km/h

length of canal in 60min =10km

length of canal in 1 min =1/60 * 10 km

length of canal in 30 min =30/60 *10 =5 km =5000m

volume of canal = L * B * H

=5000 * 6 * 1.5

v. of water in canal = volume of area irrigated

V of water in canal = v. of area irrigated * height

5000 * 6 * 1.5 = area irrigated 8 / 100

area irrigated = 5000 *6 * 1.5 *100 /8

                   =562500 m^2

                  562500/10000 hectares

                  =56.25 hectares