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An insect is at the bottom of a hemisphe...

An insect is at the bottom of a hemispherical ditch of radius 1 m. It crawls up the ditch but starts slipping after it is at height h from the bottom . If the coefficient of friction between the ground and the insect is 0.75 , then h is : `(g = 10 ms^(-2))`

A

0.20 m

B

0.45 m

C

0.60 m

D

0.80 m

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