Question

Two trains from Kolkata leave Delhi at 7 am
and 7:45 am and travel at 100 kmph and
150 kmph respectively. Approx how many
km from Delhi will the two trains be
together?
BE
A) 240 km
B) 225 km
C) 245 km
D) 230 km​

Answer 1

Answer:

Difference in time of departure between two trains = 45 min. = 4560

hour = 34

hour.

Let the distance be x km from Delhi where the two trains will be together.

Time taken to cover x km with speed 136 kmph be t hour

and time taken to cover x km with speed 100 kmph (As the train take 45 mins. more) be

t+34

= 4t+34

Now,

100 × 4t+34

= 136t

Or, 25(4t + 3) = 136t

Or, 100t + 75 = 136t

Or, 36t = 75

Or, t = 7536

= 2.08 hours

Then, distance x km = 136 × 2.084 = 283.33 km.

Answer 2

Answer:

a

Step-by-step explanation: