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Two canoes travel down a river, starting at 10:00. One canoe travels twice as fast as the other. After 3.5 hr, the canoes are 5.25 mi apart. Find the average rate of each canoe.

 Aug 26, 2020
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Let the distance travelled by the faster canoe =D

 

The distance travelled by the slower canoe =D - 5.25

 

Let the speed of the slower canoe =S

The speed of the faster canoe         =2S

 

S * 3.5 hours =D - 5.25

2S * 3.5 hours =D, solve for D, S

 

S =3/2 =1.5 mph - speed of the slower canoe.

1.5 * 2  =3 mph - speed of the faster canoe.

 

D =21/2 =10.5 miles travelled by the faster canoe.

 Aug 27, 2020

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