Question

Find the diameter of a sphere with surface area 401.7cm2.

Answer 1

Do you know the formula for the surface area of a sphere?

Answer 2

http://0.tqn.com/d/math/1/0/I/F/spherer.gif

Answer 3

SA=4pi*r^2

Answer 4

i plugged in the SA=401.7/4pi, the r^2=315.499....i am unsure if i approach the question correctly

Answer 5

correct.

Answer 6

you are right @1dpp

Answer 7

the diameter is doubled, but as i entered my answer, i incorrect?

Answer 8

\[401.7 = {4\times3.14\times r^2}\]
now solve for r

Answer 9

the answer =11 diameter....thanks :/

Answer 10

it should be 11.31 cm