Question

A spherical water tank has a diameter of 10 feet. How much water does it hold when half full? (Use 3.14 for p)

A. 261.66 cubic feet

B. 314 cubic feet

C. 523.33 cubic feet

D. 2093 cubic feet

Answer 1

The formula for the volume of a sphere is 4/3(pi)r^3. The diameter is 10 feet so r(radius) is 5 feet. So (4/3) (3.14)(5)^3 is the total volume of the sphere. But it is only half full so you would calculate (2/3)(3.14)(5)^3.

Answer 2

A

Answer 3

so i just calculate all those right???

Answer 4

yep

Answer 5

You have not stated what units you want the answer in, but for cubic feet:
(4/3(pi r^3)) /2 = 261.67 ft^3.

Answer 6

so its not C??? right???

Answer 7

no, you forgot that it is only 1/2 full, so divide by 2 and the answer is A

Answer 8

ok... thanks man... or woman

Answer 9

it was A so i agree with pfenn1 it was 261.67 and round up 261.66

Answer 10

thanks y'all

Answer 11

welcome :)

Answer 12

you're welcome