Question
Download Solution PDFA man in still water can swim with 13 km/h and the rate of current is 4 km/h. The distance travelled by man in downstream in 18 minutes is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Speed of man in still water = 13 km/hr
Speed of the stream = 4 km/hr
Time taken = 18 minutes
Formulas Used:
Speed = Distance/Time
S(downstream) = S(boat) + S(stream)
Calculation:
S(downstream) = S(boat) + S(stream)
⇒ S(downstream = (13 + 4) km/hr
⇒ S(downstream = 17 km/hr
Speed = Distance/Time
⇒ Distance = Speed x Time
⇒ Distance = 17 x (18/60)
⇒ Distance = 5.1 km
∴ The distance traveled downstream is 5.1 km
Mistake Points
Conversion of Time from minutes to hours
1 min = (1/60) hour
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