Answer:
The container to reach the ground at 1.42 sec.
Step-by-step explanation:
Given that,
Height h = 10 m
Velocity = 1 m/s
Using equation of motion for vertical height

Where, 
 =initial height
 =initial height
u = initial velocity
g = acceleration due to gravity
 = vertical height
 = vertical height
Here, 
 is zero at ground.
 is zero at ground.
Put the value into the equation




Hence, The container to reach the ground at 1.42 sec.