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Surface Area of a Cylinder

The radius an...

Question

The radius and length of arc of a sector are $10 c m$ and $15 c m$ respectively. Find its perimeter.

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Solution

Given that,
Radius, $r = 10 c m$ ,
Length of arc, $l = 15 c m$

Perimeter of the sector $= l + 2 r = (15 + 2 \times 10) c m$
$= (15 + 20) c m = 35 c m$

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