Question

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

विकल्प

• 2 : 1

• 3 : 2

•  4 : 1

• 4 : 3

Answer 1

In the given question,

The total surface area of a sphere (S₁) = 4 \[\pi r^2\]

The total surface area of a hemisphere (S₂) = 3 \[\pi r^2\]

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

`S_1/S_2 = (4 pi r^2)/ (3 pi r^2)`

`= 4/3`

Therefore, the ratio of the surface areas is 4: 3 .