Answer :

a = 51, b = 37, c = 20

s = (a + b + c)/2


s = (51 + 37 + 20)/2 = 108/2 = 54.


Area(Δ) = √s(s-a)(s-b)(s-c)


Area(Δ) = √54(54-51)(54-37)(54-20)


Area(Δ) = √54×3×17×34


Area(Δ) = 306m2


Cost of painting = Area(Δ)×Cost per m2


Cost of painting = 306×3 = Rs. 918


Hence, the statement is True.


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