Diameter of the base of a cone is 10.5 cm and its slant height is 10 c

1.	Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area. [ Assume π = 22/7 ]
Answer» Radius (r) of the base of cone = (10.5/2) cm= 5.25 cm Slant height (l) of cone = 10 cm CSA of cone = πrl = (22/7 x 5.25 x 10) cm² = (22 x 0.75 x 10) cm² = 165 cm² Therefore, the curved surface area of the cone is 165 cm².

Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area. [ Assume π = 22/7 ]

Answer»

Radius (r) of the base of cone = (10.5/2) cm= 5.25 cm

Slant height (l) of cone = 10 cm

CSA of cone = πrl

= (22/7 x 5.25 x 10) cm²

= (22 x 0.75 x 10) cm² = 165 cm²

Therefore, the curved surface area of the cone is 165 cm².