Question

The height of a right circular cone whose radius is 10 cm and slant height is
26 cm will be:
​

Answer 1

Curved surface area =πrl

=

7

22

×7×10

=220 cm

2

Answer 2

r = 10 cm

l = 26 cm

Using Pythagoras Theorem ,

h^2 = l^2 - r^2

=> h^2 = (26) ^2 - (10) ^2

=> h^2 = 676 - 100

=> h^2 = 576

=> h = √ 576

=> h = 24 cm Ans.

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