In reality which will be more heavy, a bag of cotton or a iron bar both measuring 100kg of mass?

Note: It is measured on a apring balance. or:Note: It is measured on a apring balance.or:As they both weigh 100 kgs, neither will be heavier than the

Note: It is measured on a apring balance.

or:Note: It is measured on a apring balance.

or:As they both weigh 100 kgs, neither will be heavier than the other. This is a trick question.

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