A sailboat travels 20 miles downstream in 3 hrs. it returns in 4 hrs. (cont. below)? - 20 sailboat interior
Find the speed of the sailboat in still water and the flow velocity.
Wednesday, January 27, 2010
20 Sailboat Interior A Sailboat Travels 20 Miles Downstream In 3 Hrs. It Returns In 4 Hrs. (cont. Below)?
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2 comments:
Current speed is 5 / 6 miles per hour. Speed of the boat in the water is still 35 / 6 km / h ... 5-5/6 or miles per hour.
Here's how:
Downstream:
D = 20 miles
R = 20 / 3 mph
T = 3 hours.
Upstream:
D = 20 miles
R = 5 mph
T = 4 hours.
The current rate is half the difference between the rates of upstream and downstream
20 / 3 mph LEAST 5 MPH 5 / 3 miles per hour, half of which is 5 / 6 miles per hour. Thus, the rate 5 / 6 miles per hour.
The speed of the boat in calm water by the current price and delivery conditions, and down ... or .... Add the current speed to the speed boat upstream. In any case, the answer is 35 / 6 km / h ... 5-5/6 or miles per hour.
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