the sides of the triangular plot are in the ratio 3:5:7 and its perimeter is 300 find its area
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the sides of the triangular plot are in the ratio 3:5:7 and its perimeter is 300 find its area
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Answer:
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Answer:
let the sides be 3x , 5x and 7x
perimeter = sum of all sides
300 = 3x + 5x + 7x
300 = 15x
x= 300/15
x= 20cm
3x = 20×3 = 60cm
5x = 20×5 = 100cm
7x = 20×7 = 140cm
now we have got the sides....so now we will find the area
let us consider as
a = 60cm , b = 100cm , c = 140cm
S = a + b + c / 2 = 60 + 100 + 140 / 2
S = 300/2
S = 150cm
√150 * 60 * 100 * 140
√3 *5*2*5*2*3*2*5*5*5*4*2*7*2*5
now bring out common factors and multiply...u will get the area
hope it's correct
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