# A rubber balloon has $200\;g$ water in it . It's weight in water will be (neglecting the weight of balloon)

$\begin {array} {1 1} (a)\;100\;g \\ (b)\;200\;g \\ (c)\;50\;g \\ (d)\;zero \end {array}$

Inside the water
Weight of balloon = upthrust
Since the upthrust is equal to weight of equal volume of water.
$\therefore$ Apparent weight=not in air - upthrust
zero
Hence d is the correct answer.

edited Feb 18, 2014 by meena.p