Abdul while driving ti school 'computes the average speed for his trip to be 20km/hr on his return trip along - Science - Motion

Question

Abdul while driving ti school 'computes the average speed for
his trip to be 20km/hr on his return trip along the same the same
route,there is less traffic and the average speed is 30 km/hr what
is the average speed of Abdul's trip?

Neha Sarin · Accepted Answer

Let distance = x
Total Distance = x + x = 2x
Time = x / 20 + x/ 30 = 5x / 60
Average Speed = Total Distance / Total Time
2x / (5x /60) = 2x * 60 / 5x = 24 km / hr

Abdul while driving ti school 'computes the average speed for his trip to be 20km/hr.on his return trip along the same the same route,there is less traffic and the average speed is 30 km/hr.what is the average speed of Abdul's trip?