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March 2, 2015

March 2, 2015

Posted by **bill** on Sunday, January 21, 2007 at 12:53pm.

Possible Answers:

a) 93 km/hr

b) 118 km/hr

c) 43 km/hr

d) 68 km/hr

Let x equal the speed of Jim's car.

279/x + 25 = 204/x

204x + 5100 = 279x

5100 = 75x

5100/75 = 75/75x

x = 68km/h

Therefore the avg. speed of Jim's car is 68km/h. Since Ken's car is 25km/h faster...68+25 = 93km/h.

Therefore the avg. speed of Ken's car is 93 km/h.

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