Question

a cone of slant height 5 centimetre and height 4 cm find curved surface area​

Answer 1

Slant height=5cm

Height=4cm

Radius=root of (5^2-4^2)

Radius=3cm

C.S.A.=pie×r×l

=22/7×3×5

=330/7cm^2

Answer 2

Answer:

Step-by-step explanation:

The formula for getting the curved surface area of a cone is given as :

Area = 2pie × r × l

Pie = 22/7

Since we are only given the height and the slant height we need to get the radius of the cone.

We use Pythagoras theorem.

5^2 - 4^2 = 25 - 16 = 9

r = square root of 9 = 3 cm

Substituting the formula we have :

Area = 22/7 × 2 × 3 × 5

= 94.29 square centimeters.