Answer:
453 gm
Explanation:
<u>Immersed </u>objects are buoyed up by force equal to mass of displaced liquid
400 + 53 = 453 gm in air
F = 5291.25 N
F = Ma so 1245 times 4.25^2 ,, that equals 5291.25 N
Average velocity is 1..2 mi/min east
Here, displacement = 48 mi - 42 mi = 6 miles
Time = 5 minutes
⇒ Average Velocity = 6/5 = 1.2 mi/min east