Question

s.a of a spherical bullet is 452 4/7mm^. find diameter ​

Answer 1

Answer:

Step-by-step explanation:

SA of a sphere = 4πr^2

Given SA if bullet ÷ 452/7 +4/7 mm^2

=3168/7 mm^2

=> 3168/7 = 4 × 22/7 × r^2

=>3168/7 = 88/7 × r^2

r^2 = (3168 × 7 )/7 × 88

r^2 = 3168/88

= r^2 = 36

r =√36

r = 6cm

Hence diameter = 2 × 6 = 12 cm

Hope it is clear