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The sides of a triangle are in the ratio...

The sides of a triangle are in the ratio 3 : 4 : 5. If the perimeter of the triangle is 24 cm, its area is:
एक त्रिभुज की भुजाएं 3 : 4 : 5 के अनुपात में हैं | यदि इस त्रिभुज का परिमाप 24 सेमी है, तो इसका क्षेत्रफल ज्ञात करें |

A

`18 cm^2`

B

`24 cm^2`

C

`20 cm^2`

D

`22.89 cm^2`

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