A hemispherical bowl made of brass has an inner diameter of 14 cm. Find the cost of painting it from the inside at the rate of Rs 15 per cm2.(use π = 22/7)
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. Rs 4,620.
Diameter = 14 cm so, radius = 14/2 = 7 cm
Curved surface area of hemisphere = 2πr2 = 2 × 22/7 × 7 × 7 = 308 cm2
Cost of painting = Rs. 15
Total cost = 15 × 308 = Rs.4620