Question

Fill up

1. In a cylinder, radius is doubled and height is halved, then the curved surface area will be____________.

2. The radii of two cylinders are in the ratio 2:3 and their heights are in the ratio of 5.3 the ratio of their volumes is _________.

3. The total surface area of a cone whose radius is 2r and slant height 21 is_________.​

Answer 1

Answer:

1. No change

2. 20:27

3.

Answer 2

Answer:

hi why are u leaving....