The sides of a triengular plot are 16 m 14 m and 10 m, fine the cost of laying grass in this plot at the rate of ruppees 7 per m
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By herons formulae
[s(s-a) (s-b) (s-c)]^1 /2
s=a+b+c/2
16+14+10/2
=20
[20*4*6*10]^1/2
[4800]^1/2
40(3)^1/2
[s(s-a) (s-b) (s-c)]^1 /2
s=a+b+c/2
16+14+10/2
=20
[20*4*6*10]^1/2
[4800]^1/2
40(3)^1/2
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