A balloon of volume 50 m3 (m cube) is filled with hot air of density 0.4kgm3 (kgm cube). If the weight of the fabric of balloon is 12 kgf and equipment "P" is attached to it, such that balloon is in the state of equilibrium. Calculate : i) Weight of hot air.

ii) Weight of hot air, balloon, and equipment.

iii) upthrust.

iv) weight of equipment.

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