Question

The surface areas of a sphere is 616sqm the surface areas of its hemisphere is

Answer 1

Answer:

Surface area of sphere=4πr

2

By data

4πr

2

=616

4×

7

22

×r

2

=616

r

2

=

4×22

616

7

×7

r

2

=7×7

r

2

=49

r=7 cm

∴ Diameter of the sphere=2r

=2×7

=14 cm