Question

the diameter of a spherical balloon increases from 14 cm to 28 CM as it is being pumped into it find the ratio of surface area of the balloons in the two cases ​

Answer 1

Step-by-step explanation:

surface are of sphere =

$4\pi \: {r}^{2}$

so

radius=

$\frac{14}{2} = 7cm$

$\frac{28}{2} = 14cm$

Now,

$\frac{4\pi {7}^{2} }{4\pi {14}^{2} }$

$\frac{4\pi49}{4\pi196}$

so

$\frac{1}{4}$

so the ratio is

$\frac{1}{4}$

HOPE THIS ANSWER IS CORRECT AND IT HELP YOU

PLEASE IF HELPFUL

THEN MARK IT BRAINLIST.....