A solid sphere rolls down two different inclined planes of the same heights but different angles of inclination. In each case, the ball will reach the bottom : 

With the same speed

Acceleration of the rolling sphere : 

a = gsinθ/((1+k²/R²))

Velocity of the sphere at the bottom of the inclined plane : 

v=√(2gh/((1+k²/R²)))

The sphere will reach the bottom with the same speed v because h is the same in both the cases.