Question

Davit and Mila are both travelling by train.

Davit's train travels 90 km in 50 minutes.
Mila's train travels 210 km.
It leaves at 12:05 and arrives at 13.35.
Work out the difference, in km/h, between the average speed of their trains.

Answer 1

32

Explanation:

i got this question wrong and this was the answer

Answer 2

The difference between the average speed in km/h of their trains are 53.538 km/h.

Explanation:

The given is,

Davit's train travels 90 km in 50 minutes.

Mila's train travels 210 km. It leaves at 12:05 and arrives 13:35.

Step:1

From the given,

Time required to milas train travels 210 km

= 12:05 - 13:35

= 1.30 hours

Step:2

Time to Davit's train travels 90 km is need to convert in hours from minutes,

= 50 minutes

=
`(50)/(60)` hours

= 0.833 hours

Step:3

Average rate of Davits train,

=
`(Distance traveled)/(Time taken)`

=
`(90)/(0.833)`

= 108 km/h

Step:4

Average rate of Mila's train,

=
`(Distance traveled)/(Time taken)`

=
`(210)/(1.30)`

= 161.538 km/h

Step:5

The difference between the average speed of the both trains in km/h,

= 161.538 - 108

= 53.538 km/h

Result:

The difference between, the average speed of their trains are 53.538 km/h.