engineering recuitment NMDC Junior Officer (Trainee) Mock Test 2024 Quantitative Aptitude Mensuration Solid Figures
Ravi has a cake, which is in the shape of a sphere of radius 6 cm. Then he dipped it in chocolate and kept it in the freezer. After some time he noticed that the chocolate formed a layer 2 cm thick on the top of the cake. What is the percentage change in the surface area of the cake after dipping it in chocolate?
1
77.78%
2
64.23%
3
47.45%
4
34.89%