Question

a tricky ques
which would of more weight
1kg cotton or 1kg iron ​

Answer 1

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according to me both weight the same as both weight in that is 1 kg

but cotton will be slightly less than iron

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Answer 2

Explanation:

As surface area of 1 kg cotton is more, the upthrust will be more on cotton than on iron. Hence the weight shown on the weighing machine of cotton is less than it's real weight. Therefore 1 kg of cotton will weigh more than 1 kg of iron when weighed on a weighing machine.