Question

3 Revisit
A train travels 8 km in the first quarter of an hour, 6 km in the second quarter, and 31 km in the third
quarter. What is the average speed of the train per hour over the entire journey?​

Answer 1

Explanation:

Given train travels 12 minutes with speed 30 km \hr

Then train travels =

60

30

×12=6km

And train travels 8 minutes with speed 45 km\ hr

Then train travels =

60

45

×8=6km

Then train travels distance in 12+8=20 minutes =6+6=12 km

Then average speed =

20

12

×60=36 km \hr