A straw 6 cm long floats on water. The w...

A straw `6 cm` long floats on water. The water film on one side has surface tension of `50 dyn//cm`. On the other side, camphor reduces the surface tension to `40 dyn//cm`. The resultant force acting on the straw is

`(50 xx 6 - 40xx 6 ) `dyn

10 dyn

`((50)/( 6) - ( 40)/( 6))` dyn

90 dyn

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