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SSC CGL 2018 PYQ — Question 23

SSC CGL Tier II Quant - 09/03/2018 • Quantitative Aptitude • Q23

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If sides of a triangle are 12 cm, 15 cm and 21 cm, then what is the in radius (in cm) of the triangle?

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Correct answer: C

Explanation

The correct answer is Option 3 i.e. 

Semi perimeter, 

Area, 

So,

Inradius,