RRB Group D Model Paper 4 with solutions

Question : 96 of 100

Marks: +1, -0

The radius of the incircle of a triangle is 2 cm. If the area of the triangle is 6

cm^2

, then its perimeter is

Solution:

(3) Area of triangle, A = r × s, wherer is in radius and s is semiperimeter.
s =

A/r=6/2

= 3 cm
So, the perimeter of triangle is 2 ×3 = 6 cm.

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