Question

A train covers 100 km of its journey in 40 minutes, the next 60 km in 40
minutes and the last 40 km in 20 minutes. Calculate the average speed of
the train.​

Answer 1

Answer:

2000m per minute

Step-by-step explanation:

Average speed = Total distance/Total time

= 100+60+40/40+40+20

=200/100

=2\1( 0 will cancel out)

=2km per minute ( Note: We cannot express km per min, we have to convert km into m)

2000m per minutes

Answer 2

Solution :-

given that,

→ Distance covered = 100 km

→ Time taken = 40 minutes

and,

→ Distance covered = 60 km

→ Time taken = 40 minutes

also,

→ Distance covered = 40 km

→ Time taken = 20 minutes

So,

→ Total distance covered = 100 + 60 + 40 = 200 km

→ Total time taken = 40 + 40 + 20 = 100 minutes .

then,

→ Average speed = Total distance / Total time taken

→ Average speed = 200/100

→ Average speed = 2 km / min .

therefore,

→ Distance covered in 1 min = 2 km

→ Distance covered in 60 min = 60 * 2 = 120 km .

Hence, average speed of train is 2km / min or 120 km/h .

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