solve: If the volume of a cylinder is 157m^3 and the height is 8 m, what is the radius?

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solve: If the volume of a cylinder is 157m^3 and the height is 8 m, what is the radius?

I think the teachers book is wrong- but I want to double check. Please show your steps! Thanks!

2007-03-19 14:27:32 · 2 answers · asked by Anonymous in Education & Reference ➔ Home Schooling

2 answers

Start here:

Volume of a Cylinder = height x pi x (radius^2)

157 = 8 x 3.14 x (r^2)

Solve for r^2:

r^2 = 157/ (8 x 3.14)
= 6.25

Therfore:

r = sqrt of 6.25
r = 2.5m

2007-03-19 17:38:02 · answer #1 · answered by Tom's Mom 4 · 0⤊ 0⤋

The answer i got was 3.12
Volume=2 pi radius times height
157=2 pi radius (8)
get r by itself and u get the ans

2007-03-19 14:49:33 · answer #2 · answered by ひいらぎ 5 · 0⤊ 1⤋