Question

Radii of circular ends of a frustum of cone are 1cm and 4 cm, its height is 10cm. It is melted to form a
solid cylinder of height 5cm then radius of cylinder is:​

Answer 1

Answer:

Given: Radii are 8cm & 14cm slant height =10cm

Also, we know that

curved surface area of frustum of cone is

=πl(r

1

+r

2

)

Here l=10cm,r

1

=8cm,r

2

=14cm.

so, CSA =π×10(8+14)cm

2

=10π(22)cm

2

=220πcm

2

Step-by-step explanation:

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