Radius of sphere, R = 5 cm Radius of cylinder, r = 6 cm and height of cylinder = h cm The rise in water level is equal to the height of cylinder when volumes of both solids is equal. => Volume of cylinder = Volume of sphere => $$pi r^2 h = frac{4}{3} pi R^3$$ => $$(6)^2 imes h = frac{4}{3} imes (5)^3$$ => $$h = frac{4 imes 125}{36 imes 3} = frac{125}{27}$$ => $$h = 4.63$$ cm