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A U - tube having a horizontal arm of le...

A U - tube having a horizontal arm of length 20 cm, has a uniform cross - sectional area `1cm^(2)`. It is filled with water of volume 60 cc. The volume of a liquid of density `"4 g cc"^(-1)` required to be poured in one arm of the U - tube so that no water is left in the horizontal arm of the tube is `("take g "=9.8 ms^(-2))`

A

60 cc

B

45 cc

C

50 cc

D

35 cc

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The correct Answer is:
D
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