Question

Mac travels from A to B a distance of 250km in 11/2 hr. He returns to A in 4hr 30 min. His average speed is:

Answer 1

Answer:

50km/hour

Explanation:

average speed =covered distance/ time travelled by a person/thing

so, speed =250+250/(11/2+4.5)

Answer 2

Answer:

50 km/h

Explanation:

We are given that  

Mac travel distance between A and B=250 km

He takes time from A to B=$\frac{11}{2}=5.5 hr$

Time taken from B to A=$4+\frac{30}{60}=4.5 hr$

1 hr =60 minutes

Total time taken by Mac=5.5+4.5=10 hr

Total distance traveled=250+250=500 km

Average speed =$\frac{total\;distance}{time\;taken}$

Average speed=$\frac{500}{10}=50 km/h$

Hence, the average speed of Mac=50 km/h