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The U -tube with limbs of diameters 6 mm...

The U -tube with limbs of diameters 6 mm and 3 mm contain water of surface tension `7xx10^(-2) N m^(-1)` . The angle of contact is zero and density `10^3 kg m^(-3)` . If g is 10 m`s^(-2)` , then the difference in levels in the two limbes is

A

4.6 cm

B

4.66 mm

C

4.6 m

D

0.46 mm

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The correct Answer is:
B
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