Discussion
The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then the speed of the first train is:
Answer: D
\[ v_{2} = \frac{400}{4} = 100 \text{ km/hr} \]
The speeds are in the ratio \( 7 : 8 \), so
\[ v_{1} = 100 \times \frac{7}{8} = 87.5 \text{ km/hr} \]
The first train is the slower of the two, so its speed must fall below 100 - which rules out one option without any calculation.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development