Discussion
The speed of a boat in still water is 2km/hr. If its speed upstream be 1km/hr then speed of the stream is
Answer: C
With \( b \) the still-water speed and \( r \) the stream's,
\[ \text{downstream} = b + r, \qquad \text{upstream} = b - r \]
\[ r = b - (b - r) = 2 - 1 = 1 \text{ km/hr} \]
The current slows the boat from 2 km/hr to 1 km/hr, so it must itself be 1 km/hr. Downstream the boat would manage \( 2 + 1 = 3 \) km/hr, which is why 3 appears as a distractor.
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