Q.

An inverted U-tube has its two limbs in water and kerosene contained in two beakers. If water rises to a height of 10 cm, to what height does kerosene (density 0.8 gm/c.c) rise in the other limb

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a

1.5 cm   

b

12.5 cm     

c

20 cm

d

10 cm    

answer is B.

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Detailed Solution

pwater=pkerosene

(hdg)water=(hdg)kerosene

10×1×g=hk×0.8×g

hk=12.5cm

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