A hemispherical bowls has 3.5cm radius. It is to be painted inside as well as outside. The cost of painting it at the rate of Rs 5 per 10sq. cm will be (a) Rs 77 (b) Rs 100 (c) Rs 175 (d) Rs 50

Options

A. Rs 50
B. Rs 81
C. Rs 56
D. Rs 77

Answer

D