9. Jagan went to another town such that he covered 240 km by a car going at 60 km h-!
Then he covered 80 km by a train, going at 100 km h- and the rest 200 km, he covered
by a bus, going at 50 km h-1. What was his average speed during the whole journey?
Answers
Here is your answer friend
First remember the Formula for finding average speed is
Total distance traveled/Total time taken
First let's find out total distance traveled
Total distance travelled=(240+80+200)km
=520km
FORMULA TO FIND TIME=DISTANCE/SPEED
Now we find out total time taken
Time taken to cover 240 km by car
= 240/60
=4 hours
Time taken to cover 80 km by train
=80/100
=0.8 hours
Time taken to cover 200 km by bus
=200/50
4 hours
Total time taken=4+0.8+4=8.8 hours
Now we have The two things which are required to solve the sum Total distance traveled and total time taken.
So,
AVERAGE SPEED=520/8.8
=59.09 km/pH
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