A piece of ics slides down a `45^(@)` incline in twice the time it takes to slide down a frictionless `45^(@)` incline . What is

A piece of ics slides down a `45^(@)` incline in twice the time it takes to slide down a frictionless `45^(@)` incline . What is the coefficient of friction between the ice and the incline ? .
A. `(3)/(7cot theta)`
B. `(4)/(7cot theta)`
C. `(3)/(4cot theta)`
D. `(7)/(9cot theta)`

A piece of ics slides down a `45^(@)` incline in twice the time it takes to slide down a frictionless `45^(@)` incline . What is the coefficient of fr

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