1) On an upstream trip, a canoe travels 40 km in 5 hours. Downstream, it travels the same distance in half the the time. What is the rate of the canoe in still water and the rate of the current?
2) A duck can fly 2400 miles in 10 minutes with the wind. Against the wind, it can fly only two thirds of this distance in 10 minutes. How fast could the duck fly in still air? What is the rate of the wind?
Please please help and provide an explanation?!?! Thanks sooo much in advance
2) A duck can fly 2400 miles in 10 minutes with the wind. Against the wind, it can fly only two thirds of this distance in 10 minutes. How fast could the duck fly in still air? What is the rate of the wind?
Please please help and provide an explanation?!?! Thanks sooo much in advance
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1)a canoe speed
b stream speed
upstream
a-b=40km/5hours
downstream
a+b=40km/2.5h
a-b=8
a+b=16
2a=24
a=12
b=4
canoe speed is 12km/h
stream speed is 4km/h
2) supersonic duck
a duck speed
b wind speed
a+b=2400/10
a-b=800/10
a+b=240
a-b=80
2a=320
a=160
b=80
maybe there was hours and not minutes poor duck so fast :))
b stream speed
upstream
a-b=40km/5hours
downstream
a+b=40km/2.5h
a-b=8
a+b=16
2a=24
a=12
b=4
canoe speed is 12km/h
stream speed is 4km/h
2) supersonic duck
a duck speed
b wind speed
a+b=2400/10
a-b=800/10
a+b=240
a-b=80
2a=320
a=160
b=80
maybe there was hours and not minutes poor duck so fast :))
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8 KM hour for still water and 16 KM for down stream