please solve question. 7
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area of a trngle is square root of s(s-a)(s-b)(s-c)
where s=a+b+c/2
here s=60
so s(s-a)(s-b)(s-c) = 60×21×35×4=176400
area is sq root of 176400=420
hence area of parallelogram= 2× area of its half i.e. the triangle.
which is 2×420=840
hence the cost is 840×100=84000rs
where s=a+b+c/2
here s=60
so s(s-a)(s-b)(s-c) = 60×21×35×4=176400
area is sq root of 176400=420
hence area of parallelogram= 2× area of its half i.e. the triangle.
which is 2×420=840
hence the cost is 840×100=84000rs
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