A bus stop is barricaded from the remaining part of the road, by using 100 hollow's cones made of recycled cardboard. Each cone has a base diameter of 60 cm and height 2m. If the outer side of each of the cones is to be painted and the cost of painting is ₹ 12 per meter square , what will be the cost of painting all these cones? ( use π = 3.14 and take
Answers
Answered by
1
Answer:
Given, r=
2
40
=20cm=0.2m
h=1m
l=
h
2
+r
2
=
1
2
+0.2
2
=
1.04
=1.02m
CSA =πrl=(3.14×0.2×1.02)m
2
=0.64m
2
CSA of 50 cones =50×0.64056
=32.028m
2
Cost of painting 1m
2
area =Rs.12
Cost of painting 32.026m
2
area =Rs.32.028×12
=Rs.384.336≈Rs.384.34
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3
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