# Q 3.     Abdul, while driving to school, computes the average speed for his trip to be . On his return trip along the same route, there is less traffic and the average speed is . What is the average speed for Abdul’s trip?

Given, Average speed while going to school,

And Average speed while returning back from school,

Let the distance between starting point and school be

And time taken by Abdul during the two trips be

We know,

And,              -(i)

Now, Total distance that Abdul covers =

And total time Abdul takes to cover this distance =

Therefore, the average speed for Abdul's trip is

(Note: )

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