The cost of painting the total surface area of a cone at 25 paise/cm2 is Rs 176. Find the volume of the cone, if its slant height is 25 cm.
slant height is 25 cm
Cost of painting is Rs.176Total surface area of a cone is 176×10025=704cm2
⟹πr(h+r)=704
⟹227(r2+25r)=704⟹r=7 cm
Volume of the cone is 13πr2h=13×227×(7)2×(25)=1283.33 cm3