Question

50kgs iron ;50kgs cotton which will be weighter​

Answer 1

Both things are equal because they are in equal amount 50kg=50kg

Answer 2

weight of both iron and cotton is same practically.

but according to physics....due to bulky nature of cotton more buoyant force will act on it so more cotton is required to compensate 50 kg wt...

physically

cotton has more weight then that of iron bar