Question

water in a canal,6m wide and 1.5m deep, is flowing at a speed of 4km/h. How much area will it irrigate in 10 minutes, if 8cm of standing water is neede for irrigation​

Answer 1

Step-by-step explanation:

Area of land that irrigated in 10 min is 75000 m².

Step-by-step explanation:

Given: Width of canal = 6 m

Depth of canal = 1.5 m

Speed of water = 4km/h

Height of water standing for irrigation = 8 cm = 0.08 m

To find: Area irrigated in 10 minutes.

length water cover in canal for 10 min = \frac{4\times1000\times10}{60}=\frac{4000}{6}\,m

60

4×1000×10

=

6

4000

m

Volume of water that irrigate = volume of water flow from canal in 10 minutes

Area of land × Height = Length × Width × Height

Area\,of\:Land\times0.08=\frac{4000}{6}\times6\times1.5AreaofLand×0.08=

6

4000

×6×1.5

Area\,of\:Land=\frac{4000\times1.5}{0.08}AreaofLand=

0.08

4000×1.5

Area\:of\:Land=75000\:m^2AreaofLand=75000m

2

Therefore, Area of land that irrigated in 10 min is 75000 m².

Answer 2

ans is 75000 m2

hope it helps