Question

A solid metallic sphere of radius 7cm is cut into two halves. find the total surface area of the two hemispheres so formed​

Answer 1

Answer:

462 cm

Step-by-step explanation:

TSA of hemisphere = 3πr2

3×π×49

462cm it's if one hemisphere

Hope ur doubt is clear

Answer 2

Given:

A sphere has 7cm radius

And it’s cut into tow half (2 hemispheres)

So, the radius of a hemisphere is also 7cm

Now,

hemisphere=3πr²

$hemisphere=3\times\frac{22}{7}\times7\times7$

hemisphere=3 × 22 ×7

hemisphere=462

For 2 hemispheres = 2 × 462

=924cm²

Hence The total surface area of the 2 hemisphere is 924cm²