Question

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

Answer 1

Answer:

Step-by-step explanation

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Answer 2

Answer:

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 = $\frac{4\times1000\times10}{60}=\frac{4000}{6}\,m$

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

Area of land × Height = Length × Width × Height

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

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

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

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