Question

the great circle of has an area of 400 pie ft ^2. Find the surface area and the volume

Answer 1

we have to first find radius r of the sphere using the of the great circle
since area =pi(r^2)
thus r^2 =(400 pi)/(pi)
hece r^2=400 =20x20 hence r=20 ft
now u can use the formula for volume =(4/3)(pi)(r^3) (use r=20 here )
again for surface area =4(pi)(r^2) (here also use r=20)
i hope mere calculation will help u to get the result