Question

dar base of the cylinder and h=height of the cylinder
Application : 1. If the length of radius of the base of a right circular cylinder is 12 cm. and heig
is 21 cm. Let us write by calculating, its lateral surface area.​

Answer 1

Step-by-step explanation:

Correct option is

C

11 cm

Let the radius of the base =r cm  

Therefore, the lateral surface area of cylinder=2πrh

792=2×722×r×21

r=2×22×21729×7

r=5.522 cm 

Diameter of the base =2r=2×5.522≈11 cm

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