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The area of a triangle is 15 sq cm and t...

The area of a triangle is 15 sq cm and the radius of its incircle is 3 cm. Its perimeter is equal to:
एक त्रिभुज का क्षेत्रफल 15 वर्ग सेमी है और इसके वृत्त की त्रिज्या 3 सेमी है। इसकी परिधि कितनी है?

A

12 cm

B

20 cm

C

5 cm

D

10 cm

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