Question

the ratio of surface area of two spheres is 121:81 .then the radius is​

Answer 1

Answer:

use the formula

then you will get the answer

Answer 2

Answer:

11:8

Step-by-step explanation:A=4πR∧2

A1:A2=4πR1∧2:4πR2∧2

121:81=R1∧2:R2∧2

11:8=R1:R2