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**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).**

Answer:

Given: the weight of the body in air=450kgf

Weight of the body in water =310kgf

Assumption: density of water = 1gcm-3

(i) To find the volume of the body

The volume of the body = density of water x loss in weight

= 1 x (difference in the bodyweight)

= 1 x (450-310)

= 140 cm3

(ii) To find the loss in weight of the body

Loss in weight = weight of the body in the air – the weight of the body in water

= 450 – 310

= 140 gf

(iii) To find the upthrust on the body

Upthrust = loss in weight = 140gf

The assumption made is the density of water is 1g cm-3

"hello students welcome to leader
learning
this is ashwini i teach science at leno
so here in this question
a body weighs 450 gf in air and
310 gf when completely immersed in water
so we have to find the volume of the
body the loss and weight of the body
and the up thrust on the body and we
have to also state the assumption
made in part one so here the given data
is
weight of the body in here weight of the
body
in water and the assumption we have made
is density of air is one gram
per cubic centimeter so now i am going
to take the first part that is the
volume of body
is equals to density of water multiplied
by
loss and weight so here i am putting the
values
density of water is 1 multiplied by
loss in water is the difference in
difference in body weight
okay so here i'm writing it as 1
multiplied by
450 minus
310 okay so we got the answer after
calculating this that is
140
so this is our final answer for the
volume of the body that is 140.
now if i'm talking about the second part
the loss in body weight
so loss in body weight is equals to
weight of the body in
air
minus weight of the body in water
so here we got the values that is 450
minus 310
so the answer is 140 gf
now for the first part the upthrust the
upthrust is equals to
loss of weight loss and weight
okay it is equals to loss in weight
loss and weight
now it is 140 gf so the uprest is also
140 gf
now last part is we have to state the
assumption here
so the assumption is that the density of
water is taken as
one gram per centimeter cube okay
it is one gram per centimeter
cube
i hope everything is clear to you if you
have any doubts then please put it down
in the comment section
for more such video solutions please
subscribe leader learning thank you
"

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