. A sphere and a hollow cylinder roll down without slipping on two separate inclined planes and travel the same distances in the same time. If the angle of the plane down which the sphere rolls is 30°, the angle of the other plane is (a) 60° (b) 53° (c) 37° (d) 45°​

Dear Student,
the question is incomplete the relation between the sphere  and the cylinderthe mass of them is not mention and no information about radius.
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  • -4
It is simple
Other angle = 180- (90+30) = 60 degree
  • -7
But the answer is 45 degrees... Ho ho ho !
  • 1
What are you looking for?