A cone-shaped temple top has slant height of 10 m and radius of base is 11 m. Find the total cost for painting its curved surface area at the rate of ₹7/m2 [Use $π = \frac{22}{7}$]
Answer & explanation
Correct answer: option 3
We know that,
Curved surface area = πrL
We have,
Slant height = 11 m
Radius of base = 10 m,
So, π × 10 × 11 = 110π
So, the cost of painting,
= 110π × 7 = 770 × \(\frac{22}{7}\) = Rs.2420