Question

Q 11. The ratio of the total
surface area of a sphere and a
hemi sphere of same radius is
(a) 2:1
O (b) 3:2
O (c) 4:1
(d) 4:3​

Answer 1

Answer:

the ratio of the total surface area of a sphere and a hemi sphere of same radius is

(a) 2:1

Answer 2

Answer:

D]. 4 : 3

The total surface area of sphere (S1)= 4πr²

The total surface area of a

hemisphere (S2)=3πr²

so the ratio of total surface area is a sphere and a hemisphere will be,

S1 = 4πr²

S2 3πr²

= 4

3