Question

How much will a body of weight 20N weigh in water if it displaces 1 litre of water?  

Answer 1

Weight of body in air = 20 N

Buoyant force = Weight of liquid displaced

Volume of water displaced = 1l

Density of water = 1000kg/m3

In this case,
Volume = 1000ml
Density = 1000kg/m3
Mass = 1000kg/1000ml
= 1kg

Mass = Volume
Weight of water displaced = 1 x 9.81
= 9.81N
Therefore, weight of body in water = 20 - 9.81
= 10.19 N

Answer 2

Explanation:

10.19N is the answer

Hope it helps