The inside of a hemispherical dome of radius 7 m is to be whitewashed at Rs. 12 per square metre. Taking π = 22/7, what is the cost?
Correct answer D. Rs. 3,696
Explanation
Curved surface of a hemisphere = 2πr² = 2 x 22/7 x 49 = 308 sq m. Cost = 308 x 12 = Rs. 3,696.
Answer checked How we write and check questions
Discussion