the side of triangular field flower bed in the ratio 3:4:5 and its perimeter is 240m.find its area
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Let the side be 5x,3x and 4x
5x+3x+4x=180
12x=180
x=15
Sides =75,45,60
(i) S =
2
75+45+60
=
2
180
=90
Area =
90(90−75)(90−45)(90−60)
=
90×15×45×30
=1350m
2
(ii)
2
1
×75×a=1350 [Ref. image]
a=36m
(iii) Total cost =10×Area
=10×1350
=Rs.13500
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