The given volume of the sphere is 1200ft cubed.
How do I find the surface area of it?
2007-04-22 18:08:49 · 5 answers · asked by sujubb 1 in Science & Mathematics ➔ Mathematics
Since (4/3) pi r^3=1200 solve this for r and then compute the surface area: 4*pi*r^2.
2007-04-22 18:11:31 · answer #1 · answered by bruinfan 7 · 0⤊ 0⤋
first,find the radius by multiplying the volume with 3/4 , dividing it with ft , then cube root the result to get the length of the radius
To find the area, just use the formula: Area= ft x r x r
2007-04-22 18:13:26 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Volume is (pi r^3)
So... find r
1200/pi = 381.97...
381.97^(1/3) = 7.25566... = r
Now, surface area is 4 pi r^2
So...
4 x pi x 7.25566(^2) = 661.552
2007-04-22 18:19:37 · answer #3 · answered by BotanyDave 5 · 0⤊ 0⤋
Cut it into 4 planes of circles, measure and add together!
2007-04-22 18:12:06 · answer #4 · answered by tiuredlion 2 · 0⤊ 0⤋
V = (Pi/6)d^3
S = Pi * d^2
1200 = (pi/6)d^3
7200 = pi * d^3
d^3 = 7200/pi
d = cbrt(7200/pi)
S = pi * ((7200/pi)^(1/3))^2
S = pi * (7200/pi)^(2/3)
S = about 546 ft^2
2007-04-22 18:39:30 · answer #5 · answered by Sherman81 6 · 0⤊ 0⤋