Asked by Sydney
A cylinder has surface area of 402 cm2. The height is three times greater than the radius.
What is the height of the cylinder?
What is the height of the cylinder?
Answers
Answered by
helper
r = radius
3r = height (h)
SA = 2(pi)(r)(h) + 2(pi)(r^2)
SA = 2(pi)(r)(3r) + 2(pi)(r^2)
SA = 6(pi)(r^2) + 2(pi)(r^2)
SA = 8(pi)r^2
402 = 8(pi)r^2
402 = 8(3.14)r^2
402 = 25.12r^2
16.00318 = r^2
rounding 16.00318 = 16
16 = r^2
r = 4
height = 3r = 3(4) = 12
3r = height (h)
SA = 2(pi)(r)(h) + 2(pi)(r^2)
SA = 2(pi)(r)(3r) + 2(pi)(r^2)
SA = 6(pi)(r^2) + 2(pi)(r^2)
SA = 8(pi)r^2
402 = 8(pi)r^2
402 = 8(3.14)r^2
402 = 25.12r^2
16.00318 = r^2
rounding 16.00318 = 16
16 = r^2
r = 4
height = 3r = 3(4) = 12
Answered by
Sydney
thx
Answered by
Anonymous
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