A right circular cone and a right circular cylinder have equal base a…

Question

A right circular cone and a right circular cylinder have equal base and equal height. If the radius of the base and the height are in the ratio 5 : 12, then the ratio of the total surface area of the cylinder to that of…

Accepted Answer

Option C. 17 : 9. Answer & Solution Answer: Option C Solution: Let their radius and height be 5x and 12x respectively Slant height of the cone, l = ( 5x )^2 + ( 12x )^2 = 13x & Total surface area of cylinder Total surface area of cone & = 2 r ( h + r ) r ( l + r ) & = 2 ( h + r ) ( l + r ) & = 2…

A right circular cone and a right circular cylinder have equal base and equal height. If the radius of the base and the height are in the ratio 5 : 12, then the ratio of the total surface area of the cylinder to that of the cone is :

Solution