A train travelled from Delhi to Jaipur meets with an accident after 2 hrs. It is stopped for 30 minutes, after which proceed at 3/4th of its usual speed, arriving at Jaipur 3 hr late. If the train had covered 180 km more before the accident, it would have been just 2.5 hr late. Then, find the usual rate of the train?

90 km/hr
140 km/hr
100 km/hr
120 km/hr
None of these

LohaHridoy

7 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 4 : 120 km/hr

Concept used:

Time = Distance/Speed

Calculation:

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The difference of the time (1/2 hr) is because of 180 km.

According to question -

⇒ 180/(3s/4) – 180/s = (t + 3) – (t + 2.5)

⇒ 720/3s – 180/s = 0.5

⇒ (720 – 540)/3s = ½

⇒ 180/3s = ½

⇒ 60/s = ½

⇒ s = 120 km / hr

∴ The usual rate of the train (s) is 120 km/hr.

7 views Answered 2022-09-04 04:29

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