Question

A body hasa weight 50N in air. after immersing completly in liquid its weight is 20N . then the buoyant force on the body will be a 30N b 70N c 2.5 N d none of these

Answer 1

hey mate
here is ur ans

given : actual weight = 50N
apparent weight = 20N
buoyant force = actual weight- apparent weight
= 50N- 20N
= 30N

HOPE ITS HELP U

Answer 2

A simple arithmetic!! The buoyant force which makes the body to feel lighter in weight is 30N(50N–20N) whose vector is just opposite in direction to the body's weight.

Hope it helps ya!