Question 307027
volumes of two spheres are 327pi mm cubed and 829pi mm cubed. What is the ratio of their surface areas?

4/3 *pi^r^3=  327*pi
r^3= 3*327/4
r^3=981/4
r= cuberoot 981/4
6.26 mm
surface area = 4*pi*r^2

4*pi*(6.26)^2
.

4/3 *pi*r^3= 829 *pi

r^3= 2487/4

r=8.54 mm

surface area = 4*pi^(8.54)^2

Their ratio = 4*pi*(6.26)^2 / 4*pi^(8.54)^2

Ratio of surface areas = 0.73