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The value of the factor K in finding the storm water flow by Rational method is ____________

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The value of the factor K in finding the storm water flow by Rational method is ____________

(a) 100

(b) 160

(c) 1

(d) 1/360

The question was posed to me in unit test.

My question is based upon Rational Method topic in portion Water Supply for Building, Collection and Conveyance of Sewage, Waste Water Flow Rate of Environmental Engineering

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Correct option is (d) 1/360

For explanation I would say: According to the Rational method, the storm water or runoff is defined by

Q = K*A*I*R where, K is a constant and K = 1/360,

So, Q = A*I*R/360.

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