a rhombus sheet whose perimeter is 32m and whose one diagonal is 10 m long is painted on both sides at the rate of rupees 5 per metre square. find the cost of painting.
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Answer:
perimeter = 4*side
32/4=side
side=8m
area of rhombus = 1/2*d*D
d=10m(given)
D=2√8²-5²
D=2√64-25
D=2√39
⇒area of 2 sides = d*D
= 20√39m²
cost=100√39 rups
=rs 624.5
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