Weight of an empty balloon is W1. Air of weight W is filled in the balloon and weight of the air filled balloon is W2. If the air inside the balloon has the same density as the outside air, then
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a
W2=W+W1
b
W2=W1
c
W2=W1-W
d
W2=WW1
answer is B.
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Detailed Solution
Since buoyant force cancels the weight of air W, we can conclude W1=W2
Weight of an empty balloon is W1. Air of weight W is filled in the balloon and weight of the air filled balloon is W2. If the air inside the balloon has the same density as the outside air, then