A bus stop is barricaded from the remaining part of the road,by using 50 hollow cones made of recycled cardboard.Each cone has a base diameter of 40 cm and height 1m.If the outer side of the cones is to be painted and the cost of painting is Rs 12 per m square,what will be the cost of painting all these cones? Hint-(Use the π=3.14 and take √1.04=1.02)
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Step-by-step explanation:
r=d/2
here r=0.2m
h=1m
l=√r²+h²
l=√1.04=1.02
CSA of cone = πrl
=0.64056
area of 50 cones = 0.64056×50
=32.028
cost of painting 1 m² = 12 rs
32.028m²= 384.34
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