Question

Abdul, while driving to school. computes the average speed for
his trip to be 20 km h-!. On his return trip along the same
route, there is less traffic and the average speed is
30 km h? What is the average speed for Abdul's trip?
​

Answer 1

Answer:

12km/h

Step-by-step explanation:

t=d/20 and t=d/30

speed=d/d/30+d/20

d/5d×60=85