The radius of a hemisphere is 14 cm. What is the cost of painting the outer curved surface of the hemisphere at the rate of ₹45 per cm ?(Take $π =\frac{22}{7}$) |
₹53160 ₹55440 ₹56820 ₹58280 |
₹55440 |
We know that, Surface area of a hemisphere = 2πr2 We have, Radius of hemisphere = 14 cm. So, outer surface area of hemisphere = 2 × \(\frac{22}{7}\) × 142 = 1232 cm2 The cost of painting = 1232 × 45 = ₹55440 |