Question

The relative density of a body weighing 20N in air is 4. It's weight in water is
A) 5N
B)10N
C)15N
D)20N

Answer 1

Answer:

Weight in water = 15 N

Explanation:

Weight in water = Weight in Air - Upward Force in Water

Now, Upward Force in water = M / ρ = 20 / 4 = 5 N

Weight in water = 20 N - 5 N

Weight in water = 15 N

Answer 2

Answer:

C. 15N is your correct answer.....