Answer: 105.3 m
Step-by-step explanation:
Given
Applied force is 
Work done is 
Work done is given by the displacement done by the force.

Answer: = 240 mph.
Step-by-step explanation:
Let x = speed of the plane.
t= time taken
As per given, we have
[Time = distance / speed]
From (i) and (ii), we get

Hence, the speed of the plane = 240 mph.
In finding the sum of 2+5 you would go right on the number line, while in finding the sum of -2+(-5) you would go left on the number line