Answer:

• Speed for the first half of the distance = 40 m/s
• Speed for the second half of the distance = 80 m/s
• Average Speed = ?

• So here we shall first find the time taken by the body by assuming the two times as x/2 using the speed formula [Speed = Distance/Time]. And then simply substituting the values on the formula for average speed we shall get our Answer!!

Similarly the time taken for d² will be,

Verified answer

Answer:

The total average speed is 120 m/s