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 `1` `m`. If the outer side of each of the cones is to be painted and the cost of painting is ` 12 ` ` per` ` m^2` , what will be the cost of painting all these cones? (Use π = 3.14 and take √ 1.04 = 1.02)

Explanation

1)`CSA=pirl`

=`3.14*20*10^(-2)*sqrt(1^2+(0.2)^2)`

=`0.64056m^2`

TSA=50*0.64056

=32.28`m^2`

`1m^2=12Rs`

`32.28m^2=38.736.