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  • A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard . each one has a base diameter of 40cm and hieght 1 metre . if the outer side of each of the conesis to be painted and the cost of painting i

A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard . each one has a base diameter of 40cm and hieght 1 metre . if the outer side of each of the conesis to be painted and the cost of painting is Rs 12 m2, what will be the cost of painting all these cones ? (use pie= 3.14 and take root1.4 = 1.02)

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curved;surface;area;of;a;cone=pi imes r; l\*where,; r=radius;of;the;base;of;thr;cone(r=0.2;m)\*indent indent l=slant;height;of;the;cone(l=?)\*h=1;m\* l=sqrth^2+r^2=sqrt1+0.04=sqrt1.04=1.02;m\* curved;surface;area;of;1;cone=pi imes r imes l\* curved;surface;area;of;50;cone=50 imes pi imes r imes l\* curved;surface;area;of;50;cone=50 imes pi imes 0.2 imes 1.02;m^2\* curved;surface;area;of;50;cone=32;m^2\* Now,;cost;of;paint;for;1;m^2=Rs;12\* cost;of;paint;for;32;m^2=Rs;12 imes 32=Rs;384\* Hence,;painting;cost;for;all;cones;is;Rs;384

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Deependra Verma

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