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AMU Engineering 2020 solved paper Solved Paper
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© examsnet.com
Question : 36
Total: 150
Two water pipes of diameters
2
c
m
and
4
c
m
are connected with the main supply line. The velocity of flow of water in the pipe of 2 cm diameter is
4 times that in the other pipe
1
4
times that in the other pipe
2 times that in the other pipe
1
2
times that in the other pipe
Validate
Solution:
Given,
d
A
=
2
c
m
and
d
B
=
4
c
m
∴
r
A
=
1
c
m
and
r
B
=
2
c
m
From equation of continuity
a
v
=
constant
∴
v
A
v
B
=
a
B
a
A
=
π
(
r
B
)
2
π
(
r
A
)
2
=
(
2
1
)
2
⇒
v
A
=
4
v
B
© examsnet.com
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