Speed of a boat in standing water is 14 kmph and the speed of the stream is 1.2 kmph. A manrows to a place at a distance of 4864 km and comes back to the starting point. The total time taken by him is?
- 1010 hours
- 700 hours
- 1400 hours
- None of these
Explanation
Speed of the boat in standing water = 14 kmph
Speed of the stream = 1.2 kmph
Speed downstream = 14 + 1.2 = 15.2 kmph
Speed upstream = 14 - 1.2 = 12.8 kmph
Distance to the place = 4864 km (same for downstream and upstream)
Time taken downstream:
Time = Distance / Speed
= 4864 / 15.2
= 320 hours
Time taken upstream:
Time = Distance / Speed
= 4864 / 12.8
= 380 hours
Total time taken:
Total Time = Time downstream + Time upstream
= 320 + 380
= 700 hours
Related MCQs
- 4 kilometers
- 5 kilometers
- 7 kilometers
- None of above
اس سوال کو وضاحت کے ساتھ پڑھیں
- 50 km/hour
- 100 km/hour
- 150 km/hour
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 3 hours 30 minutes, treating the speed change as extra delay.
- 3 hours 18 minutes, being 48 + 48 12 minutes plus 1 hour 30 minutes.
- 2 hours 48 minutes, using an overall average speed.
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 60 minutes
- 90 minutes
- 108 minutes
- 120 minutes
اس سوال کو وضاحت کے ساتھ پڑھیں
- 10 minutes
- 15 minutes
- 20 minutes
- 25 minutes
اس سوال کو وضاحت کے ساتھ پڑھیں
