Two trains 195 m and 181 m long respectively are moving towards each other. Their speeds are 19 m/s and 28 m/s respectively. How much time will the trains take to cross each other?

This question was previously asked in
CRPF Constable Technical Tradesman Official Paper (Held On: 01 July, 2023 Shift 2)
View all CRPF Constable Papers >
  1. 11 seconds
  2. 10 seconds
  3. 12 seconds
  4. 8 seconds

Answer (Detailed Solution Below)

Option 4 : 8 seconds
Free
General Science for All Railway Exams Mock Test
2.1 Lakh Users
20 Questions 20 Marks 15 Mins

Detailed Solution

Download Solution PDF

Given:

Length of Train 1 = 195 m

Length of Train 2 = 181 m

Speed of Train 1 = 19 m/s

Speed of Train 2 = 28 m/s

Formula Used:

Relative Speed = Speed of Train 1 + Speed of Train 2 (since they are moving towards each other)

Time = Total Distance / Relative Speed

Calculations

Total Distance = Length of Train 1 + Length of Train 2

Total Distance = 195 m + 181 m = 376 m

Relative Speed = 19 m/s + 28 m/s = 47 m/s

Time = Total Distance / Relative Speed

Time = 376 m / 47 m/s

Time = 8 seconds

∴ The trains will take 8 seconds to cross each other

Latest CRPF Constable Updates

Last updated on Jan 23, 2025

-> The CRPF Constable Scorecard & Cut Off have been released.

-> The PET/PST, Document Verification, and Medical Examination was conducted from 18th November 2024 onwards.

-> The written exam was conducted from 1st to 12th July 2023.

-> The CRPF Constable Notification (2023) was released for 9212 vacancies.

-> The selection process includes a Computer Based Test, Physical Standards Test (PST), Physical Efficiency Test (PET), Trade Test, Document Verification, and  Medical Examination.

->  To prepare for the exam practice using CRPF Constable Previous Year Papers. Also, attempt CRPF Constable Mock Test.

More Problem on Trains Questions

More Speed Time and Distance Questions

Get Free Access Now
Hot Links: teen patti lotus teen patti earning app teen patti party