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The sides of a triangular plot are in the ratio 3:5:7 and its perimeter is 300m.Find its area

Posted by Khushi Sharma 6 years, 8 months ago

CBSE > Class 09 > Mathematics

1 answers

Amal R John 6 years, 8 months ago

First we will take the common ratio X Then 3x +5x+7x=300m 15x=300 x=300/15 =20 m 3x =3*20 =60m 5x=5*20=100m 7x=7*20=140m Semiperimeter =(60+100+140)/2 Then area could be find by putting herons formula that is when all the three sides of the triangle are given √s(s-a)(s-b)(s-c) Where s = semiperimeter a=60 b=100 c=140

1Thank You

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CBSE > Class 09 > Mathematics