Question
Download Solution PDFA man rows downstream at 20 km/hr and rows upstream at 15 km/hr. At what speed he can row in still water?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
A man rows downstream at 20 km/hr and rows upstream at 15 km/hr.
Concept:
The speed of rowing in still water is the average of the downstream and upstream speeds.
Formula Used:
Speed in still water = (Downstream speed + Upstream speed) / 2
Calculation:
We have,
⇒ Downstream speed = 20 km/hr
⇒ Upstream speed = 15 km/hr
Using the formula,
⇒ Speed in still water = (20 km/hr + 15 km/hr) / 2
⇒ Speed in still water = 35 km/hr / 2
⇒ Speed in still water = 17.5 km/hr
∴ The correct answer is option 1.
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