Bissoy.com
Doctors Medicines MCQs Q&A

A train running at speed of 54 km/hr crosses a platform of length same as that of the train in 36 seconds. If train which is 230 meters long crosses the same platform in 25 Seconds, then find the speed of train B (in km/hr).

A train running at speed of 54 km/hr crosses a platform of length same as that of the train in 36 seconds. If train which is 230 meters long crosses the same platform in 25 Seconds, then find the speed of train B (in km/hr). Correct Answer 72 km/hr

Let the length of train be x

Then, the length of platform is also x

Speed of train = 54 km/hr = 54 × (5/18) m/s = 15 m/s

∴ According to question

(x + x)/15 = 36

⇒ 2x = 540

⇒ x = 270 m

The length of the platform is 270 m

Now, a train of length 230 m crosses the platform in 25 sec

Let the speed of train be v m/s

⇒ (270 + 230)/v = 25

⇒ v = 20m/s

Speed of train = 20 m/s = 20 × (18/5) = 72 km/hr

∴ The speed of the train is 72 km/hr

Related Questions

A train with uniform speed crosses a 162m long platform in 36 seconds and another platform 120 m long in 30 seconds. Which of the following statements are correct A. As the length of the platform is changing, the time taken to cover the distance will also change.  B. Speed of the train is 7 m/seconds. C. The length of the train is more than the length of platform 1. D. Train is 90 meters long. E. Length of both the platforms to be added to find the length of the train. Choose the correct options given below.
A train running at a speed of 54 km/hr crosses a platform in 30 seconds. The platform is renovated and its length is doubled. Now, the same train running at same speed crosses the platform in 46 seconds. Find the length of the train.
As soon as a passenger train enters the platform, a stray dog starts chasing the train till the end of platform. The train was 200 m long. The platform was 1600 m long. Driver of the train however finds that the dog is not running at all, only pretending to run as neither it moves ahead nor lags behind during the whole time train crosses the platform. But a person standing on the platform tells that the dog was running at a speed of 60 m/s. What was the speed of the train?
Train A running with the speed of 20 m/s crosses a platform in 30 seconds. Another train B whose length is 150 metre more than length of train A is running with the speed of 10 m/s crosses a pole in 40 seconds. Find the length of platform.
In the following question, two statements are numbered as A and B. On solving these statements, we get quantities A and B respectively. Solve both quantities and choose the correct option. Quantity A: A 300 m long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform? Quantity B: A train running at 60 kmph crosses a pole in 30 seconds. What is the length of the train?
A train crosses a 300 meters long platform in 15 seconds running at 50% of its normal speed and crosses a pole in 6 seconds running at its normal speed. What is the length of the train?
Given below are two quantities named A and B. Based on the given information, you have to determine the relation between the two quantities. You should use the given data and your knowledge of Mathematics to choose between the possible answer. The length of the first train is 40% more than the length of the second train. Time taken by the first train to cross a 200 m long platform when the second train crosses a person standing on the same platform in 25 sec. If the speed of both trains is 60 km/h and 36 km/h respectively. Quantity A: Numerical value of the time taken by the first train to cross the platform (in seconds) Quantity B: Numerical value of the length of the second train (in Km).
The length of a train is 100 meter and its speed is 72 km/hr. If the train crosses a x meter long platform in 10 seconds. If passengers are standing on that platform at every 4 meters, then tell how many passengers are standing to the end of the platform if there is no passenger at the starting point and also find the length of the platform.
To cross a man standing on platform, a train takes 40 seconds. When the same train crosses the platform at half its speed, it crosses the platform in 120 seconds. Find the ratio of lengths of train and platform.
A 540 m long train, running at a uniform speed, crosses a platform in 55 seconds and crosses a man standing on the platform in 36 seconds. What is the length of the platform?