Question

An ice cream cone has a radius of 12.5 cm and a height of 12 cm find its surface area​

Answer 1

Radius of cone =r of h.s

r=3.5

Total height =12.5

Total h of cone −h.s.

12.5−3.5

h of conical =9 cm

V. of ice cream in the cone = volume of conical part +V. of h.s.

=

3

1

πr

2

h+

3

2

πr

3

=

3

1

πr

2

(h+2r)

=

3

1

×

7

22

×(3.5)

2

(9+2×3.5)

=

3

1

×

7

22

×(3.5)

2

(9+7)

=

2

1

×

7

22

×(3.5)

2

×16

V. of ice cream in the cone =205.33 cm

2

.