Question

Find the diameter of a sphere whose surface area is 154cm square

Answer 1

Surface area of sphere = 4πr2. 2. 4πr2 = 154 3. 4.22/7.r2= 154 4. R2= 154.7/22.1/4. 5. R2= 7/4 6. R= 7/2 then the diameter = 7 cm.