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Question
A body weighs 450 gf in air and 310 gf when completely immersed in water. Find
(i) The volume of the body,
(ii) The loss in weight of the body, and
(iii) The upthrust on the body.
State the assumption made in part (i).
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Solution
Weight of body in air = 450 gf
Weight of body in water = 310 gf
(i) Volume of the body = Loss in weight × density of water
= (450 - 310) × 1 [Assumption : density of water = `1 "g cm"^-3`]
= 140 `"cm"^3`
(ii) Loss in weight = Weight of body in air - Weight of body water
= (450 - 310) gf
= 140 gf
(iii) Upthrust on body = loss in weight = 140 gf
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