Question

If the radius of a sphere is doubled then what is the ratio of their surface area
a)1:4
b)1:2
c)4:1
d)2:1

Answer 1

Answer:

1:4

Step-by-step explanation:

4πr^2/4π×4r^2=1:4

please mark it as the brainliest answer

Answer 2

s1 =4^r2

s2=4^(2r)2 =16^r2 s2/s1 =16^r2/ 4^r2 =4/1 =4:1