SOLUTION: Jack and Jean walked in opposite directions for 2 hours, travelling a total distance of 24 km. Jack walked at an average rate that was twice as fast as Jean. Show Jack's average ra
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Question 767797: Jack and Jean walked in opposite directions for 2 hours, travelling a total distance of 24 km. Jack walked at an average rate that was twice as fast as Jean. Show Jack's average rate of speed in kilometres per hour. Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! Jack and Jean walked in opposite directions for 2 hours, travelling a total distance of 24 km. Jack walked at an average rate that was twice as fast as Jean. Show Jack's average rate of speed in kilometres per hour.
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let x=jean's rate of speed
2x=jack's average rate of speed
distance=traveling time*rate
2x+2*2x=24
2x+4x=24
6x=24
x=4
2x=8
jack's average rate of speed=8 km/hr
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