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Mathematics
Problem
Two solid cylinders are made of the same uniform material. Cylinder A has radius
r
r
r
and height
h
h
h
. Cylinder B has twice the radius
(
2
r
)
(2r)
(
2
r
)
and half the height
(
1
2
h
)
(\tfrac{1}{2}h)
(
2
1
h
)
. Which of the following gives the ratio of their masses
m
B
/
m
A
m_B/m_A
m
B
/
m
A
? a)
4
4
4
b)
1
1
1
c)
2
2
2
d)
8
8
8
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