Question

if a train is run at 40 km/h then it is delayed by 11 minutes and when it runs at a speed of 50km/h then it is delayed by 5 min then find the time taken by train to complete its whole journey?




(a) 15
(b) 18
(c) 19
(d) 78​

Answer 1

Answer:

C) 19 minutes.

Step-by-step explanation:

Let t be the actual time. Let d be the distance.

We know that time = distance/Speed.

t + 11/60 = d/40

t + 5/60 = d/50

40( t + 11/60) = 50(t + 5/60)

40t + 22/3 = 50t + 25/6

10t = 22/3 - 25/6 = 44 - 25/6 = 19/6

t = 19/60 hr = 19 minutes.

Answer 2

Answer:

c is the correct option