Question

Find the curved surface area of a right circular cone with a radius of 40
cm. The height of the cone is one-third of the length of a rectangle. The rectangle has a perimeter of 96 cm and a breadth of 21
cm. Round off the final answer to the nearest integer, using π = 22/7.

A 5,484 cm²
B 4,836 cm²
C 4,972 cm²
D 5,154 cm²
E 4,692 cm²
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