cougs cougs
  • 22-03-2018
  • Mathematics
contestada

HELP PLEASE BECAUSE KHAN ACADEMY SUCKS!

HELP PLEASE BECAUSE KHAN ACADEMY SUCKS class=

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Vane11807
Vane11807 Vane11807
  • 22-03-2018
I think it’s 10 cm
Don’t know if I’m right tho
Answer Link
jcherry99
jcherry99 jcherry99
  • 22-03-2018
volume Large Can
r = 8 cm
pi = 3.14
h = 20 cm
V = pi r^2 h
V = 3.14*8^2 * 20
V = 4019 cm^3

Volume left over.
He has 1/4 of a can of  paint left.
V1 = 1/4 * 4019
V1 = 1004.8

Calculate height.
V = 1004.8
pi = 3.14
r = 5 cm^2
h = ??

h = V/(pi r^2)
h = 1004.8 / (3.14 * 5^2)
h = 1004.8 / 78.5
h = 12.8 cm

There are other ways of doing this, but this is the clearest.
Answer Link

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