Question

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

Answer 1

Answer:

answer. 225000m2

Step-by-step explanation:

Question

Answers

Water in a canal, 30dm wide and 12dm deep is flowing with velocity of 10km/hr. How much area will it irrigate in 30 minutes, if 8cm of standing water is required for irrigation?

Answer

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Hint: We have given here the width and depth of the canal and we have to calculate the area irrigated w.r.t the time given.

Complete step-by-step answer:

We have,

Width of the canal = 30dm= 300cm = 3m

Depth of the canal = 12dm = 120cm = 1.2m

It is given that the water is flowing with a velocity 10km/hr = 10000m/h

Therefore length of the water column formed in 30mins =10000×12 = 5000m

Volume of the canal is given by the formula, Volume=Length×Width×Depth

Let xm2 of area is irrigated in

x×8100=5000×1.2×3

⇒x=225000m2

So the answer is 225000m2.