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Question: Two capillaries made of the same material with radii \(r _ { 1 } = m m\)) is 30 cm, then the rise in...

Two capillaries made of the same material with radii r1=mmr _ { 1 } = m m) is 30 cm, then the rise in the other will be

A

7.5 cm

B

60 cm

C

15 cm

D

120 cm

Answer

15 cm

Explanation

Solution

h2h1=r1r2=12⇒h2=302=15 cm\frac { h _ { 2 } } { h _ { 1 } } = \frac { r _ { 1 } } { r _ { 2 } } = \frac { 1 } { 2 } \Rightarrow h _ { 2 } = \frac { 30 } { 2 } = 15 \mathrm {~cm}