A body is sliding down on a rough inclined plane of inclination $45^{0}$ . The time taken by it to slide down on the rough inclined plane is 3 times the time taken by the body to slide down the smooth inclined plane of same inclination. The coefficient of friction between rough inclined plane and the body is

1/3

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2/3

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1/9

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8/9

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Solution

The correct option is D 8/9

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