The circumference of the base of a conical tent of height 8 m is 32 π m. Find its curved surface area.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. π m2.
Curved Surface Area = πrl
circumference = 2πr
⇒ 2πr = 32π
⇒ r = 16
⇒ Slant height2 = Radius2 + height2
⇒ Slant height = 8√5
Curved surface area = π × 16 × 8√5
⇒ 128√5π