Correct option is C
Manyata rowed a certain distance downstream in 2 hours while it took her 30 minutes more to row the same distance upstream. How much time will she take to make the two-way journey in still water?
Given:
- Time downstream = 2 hours
- Time upstream = 2 hours + 30 minutes = 2.5 hours
- Distance downstream = Distance upstream = d
Speeds downstream and upstream
Speed downstream,
Speed upstream,
Calculate speed in still water (S)
Calculate time taken for two-way journey
Total distance = 2d
Time =
Convert time to hours, minutes, and seconds
≈ 4.4444 hours = 4 hours + 0.4444 × 60 minutes = 4 hours 26 minutes + 0.67 × 60 seconds ≈ 40 seconds
Time taken for two-way journey = 4 hours 26 minutes 40 seconds
Option (C) 4:26:40 hours
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