Question

The diameter of the base of a cone is 21 cm, and its slant height is 10 cm. The curved surface area is​

Answer 1

Step-by-step explanation:

Curved surface area of a cone is πRL.

Now as per question,radius R is diameter/2= 21/2=

10.5cm.

Now slant length L is 10cm.

So curved surface area is πRL= πX 10.5X10 cm2= 329.7 cm2