The ratio of length of 2 trains is 5 : 6 and the ratio of their speeds is 2: 3. Find the ratio of time taken by them to cross a pole.

Report

Report an issue

Name

Email

Message

Submit

Cancel

RRB NTPC Exam 27 Jan 2021 click here to view all questions

The ratio of length of 2 trains is 5 : 6 and the ratio of their speeds is 2: 3. Find the ratio of time taken by them to cross a pole.

A05:04

B07:04

C02:07

D05:07

Akhilesh ? Apr 2 '25 at 23:24

correct answer is: 05:04
Explanation: The ratio of the time taken by the two trains to cross a pole is determined by the ratio of their lengths divided by their respective speeds. For the first train, the time is \( \frac{5}{2} \) units, and for the second train, it is \( \frac{6}{3} = 2 \) units. Simplifying the ratio \( \frac{5}{2} : 2 \) gives \( 5:4 \)

• OPTION a (05:04): Correct, as derived above.
• OPTION b (07:04): Incorrect, as it does not match the calculated ratio.
• OPTION c (02:07): Incorrect, as it inverses the correct ratio.
• OPTION d (05:07): Incorrect, as it does not match the calculated ratio.

All DiscussionsClick here to write answer

correct answer is: 05:04 Explanation: The ratio of the time taken by the two trains to cross a pole is determined by the ratio of their lengths divided by their respective speeds. For the first train, the time is \( \frac{5}{2} \) units, and for the second train, it is \( \frac{6}{3} = 2 \) units. Simplifying the ratio \( \frac{5}{2} : 2 \) gives \( 5:4 \) OPTION a (05:04): Correct, as derived above. OPTION b (07:04): Incorrect, as it does not match the calculated ratio. OPTION c (02:07): Incorrect, as it inverses the correct ratio. OPTION d (05:07): Incorrect, as it does not match the calculated ratio. Akhilesh ? answered Apr 2 '25 at 23:24

Post your answers here:

Post

Post your comments here:

Message

Post

Cancel