Question

find surface area of sphere if diameter = 7 cm​

Answer 1

T.S.A of sphere = 4 (Pi)*r^2

r=7/2

T.S.A=4*22/7*7/2*7/2

=4*154/4

=154cm^2

Answer 2

Answer:

153.86 sq.cm

Step-by-step explanation:

d=7 cm

r= 7/2 cm

S.A of sphere=4 π r2

=4 * 3.14 * 49/4

=12.5 * 49/4

=135.86 sq.cm

hope this will help u!