Question

17. If a right circular cone of vertical height 24 cm has volume equal to​

Answer 1

Given h=24cm V=1232 cm

3

V=

3

1

πr

2

h

∴1232=

3

1

×

7

22

×r

2

×24

r

2

=

22×24

1232×3×7

=49

r=7cm

l=

h

2

+r

2

=

24

2

+7

2

=

576+49

=25cm

Curved surface area=πrl

=

7

22

×7×25

=550cm

2

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