the sides of a triangular plot are in the ratio of 3:5:7and its perimeter is 300m.find its area
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let the common ratio be x
3x
5x
7x
perimeter of triangle=300
3x+5x+7x=300
15x=300
x=300÷15
x=20
3x=60
5x=100
7x=140
area of triangle=1/2×b×h
1/2×60×100
30×100=3000
3x
5x
7x
perimeter of triangle=300
3x+5x+7x=300
15x=300
x=300÷15
x=20
3x=60
5x=100
7x=140
area of triangle=1/2×b×h
1/2×60×100
30×100=3000
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