Question

the curved surface area of a right circular cylinder of height 14cm is 440cm square.find its base radius

Answer 1

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Given -:

Height of a right circular cylinder = 14cm

Curved surface area of the right circular cylinder = 440cm

As we know that,

Curved surface area of a cylinder = 2πrh

$= > 440cm = 2 \times 22 \div 7 \times r \times 14$

$= > r = (440 \times 7) \div (2 \times 22 \times 14)$

$= > r = 5cm$

So, the base radius = 5cm...

Answer 2

let the base radius of the cylinder be r cm.
Given:
CSA=440cm sq.
therefore 2πrh=440cm sq.
height=14cm
so, 2×22/7×r×14=440
88r=440
r=5cm