the sides of triangular plot are in the ratio 3 :5 :7 and its perimeter is 300 M find its area in centimetre
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3x + 5x + 7x = 300m
15x = 300m
x = 300/15
x = 20
3x = 3 × 20= 60
5x = 5× 20= 100
7x = 7× 20= 140
Therefore, area of traingle is 60+100+140= 300m
15x = 300m
x = 300/15
x = 20
3x = 3 × 20= 60
5x = 5× 20= 100
7x = 7× 20= 140
Therefore, area of traingle is 60+100+140= 300m
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