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The total time taken by a boat to cover 400 km downstream and 320
upstream is 40 hours. If downstream speed of the boat is 4 km/hr
more than upstream speed of the boat, then find the time taken (in
hours) by the boat to cover 720 km downstream.?
Most Upvoted Answer
The total time taken by a boat to cover 400 km downstream and 320 upst...
Given information:
- Total distance downstream = 400 km
- Total distance upstream = 320 km
- Total time taken = 40 hours
- Downstream speed = Upstream speed + 4 km/hr

Calculating Speeds:
Let the upstream speed be x km/hr.
Then, downstream speed = x + 4 km/hr.

Calculating Time:
- Time taken downstream = Distance/Speed = 400/(x+4) hours
- Time taken upstream = Distance/Speed = 320/x hours
Given that the total time taken is 40 hours:
400/(x+4) + 320/x = 40
Solving the above equation gives x = 8 km/hr (Upstream speed) and downstream speed = 12 km/hr.

Calculating Time to cover 720 km downstream:
- Time taken downstream = 720/12 = 60 hours
Therefore, the boat will take 60 hours to cover 720 km downstream.
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The total time taken by a boat to cover 400 km downstream and 320 upstream is 40 hours. If downstream speed of the boat is 4 km/hr more than upstream speed of the boat, then find the time taken (in hours) by the boat to cover 720 km downstream.?
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The total time taken by a boat to cover 400 km downstream and 320 upstream is 40 hours. If downstream speed of the boat is 4 km/hr more than upstream speed of the boat, then find the time taken (in hours) by the boat to cover 720 km downstream.? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about The total time taken by a boat to cover 400 km downstream and 320 upstream is 40 hours. If downstream speed of the boat is 4 km/hr more than upstream speed of the boat, then find the time taken (in hours) by the boat to cover 720 km downstream.? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The total time taken by a boat to cover 400 km downstream and 320 upstream is 40 hours. If downstream speed of the boat is 4 km/hr more than upstream speed of the boat, then find the time taken (in hours) by the boat to cover 720 km downstream.?.
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