What is the cost of a tadpole required to make a conical tent with slant height 15 m and height 9 m, when one square meter tadpole costs ₹147?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e Rs. 83160.
r² = l² - h²
r² = 15² - 9² = 225 - 81 = 144
r = √144 = 12 m
Curved surface area (CSA) = π × r × l = 22/7 × 12 × 15 ≈ 3960/7 m²
Cost = Surface area × Cost per m² = 3960/7 × 147 ≈ ₹83,160