Question : A moving train passes a 50-metre-long platform in 14 seconds and a lamp post in 10 seconds. The speed of the train (in km/hr) is:
Option 1: 24 km/hr
Option 2: 36 km/hr
Option 3: 40 km/hr
Option 4: 45 km/hr
Latest: SSC CGL 2024 final Result Out | SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL Tier 1 Scorecard 2024 Released | SSC CGL complete guide
Suggested: Month-wise Current Affairs | Upcoming Government Exams
Correct Answer: 45 km/hr
Solution : Length of platform = 50 m Time taken to pass the platform = 14 s Time taken to pass the lamp post = 10 s Let the length of the train be $l$ and the train's speed be $s$. $s$ = $\frac{l+50}{14}$ ----------(1) $s$ = $\frac{l}{10}$ -------------(2) ⇒ $\frac{l+50}{14}$ = $\frac{l}{10}$ ⇒ $10l+500$ = $14l$ ⇒ $500$ = $4l$ ⇒ $l$ = $\frac{500}{4}$ = 125 m Speed of the train = $\frac{125}{10}×\frac{18}{5}$ = 45 km/hr Hence, the correct answer is 45 km/hr.
Candidates can download this ebook to know all about SSC CGL.
Admit Card | Eligibility | Application | Selection Process | Preparation Tips | Result | Answer Key
Question : 150 metres long train passes a telegraphic post in 12 seconds. Find the speed of the train (in km/h).
Option 1: 50
Option 2: 12.5
Option 3: 25
Option 4: 45
Question : A goods train 350 m long passes through a tunnel of length 1250 m in 80 seconds. What is the speed of the train?
Option 1: 64 km/hr
Option 2: 56 km/hr
Option 3: 78 km/hr
Option 4: 72 km/hr
Question : If a train is 75 metres long and moving at 60 km/hr, how long does it take to pass by a certain telegraph post?
Option 1: 3.5 seconds
Option 2: 4.5 seconds
Option 3: 5 seconds
Option 4: 5.4 seconds
Question : If a train is 60 metres long and travelling at 36 km/hr, how long will it take to pass by a telegraph post?
Option 1: 9 seconds
Option 2: 8 seconds
Option 3: 7 seconds
Option 4: 6 seconds
Question : The length of a train is 330 metres and it is moving at the speed of 72 km/hr. In how much time will it take to cross a platform of length 710 metres?
Option 1: 52 seconds
Option 2: 56 seconds
Option 3: 72 seconds
Option 4: 64 seconds
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile