SOLUTION: John can jog twice as fast as he can walk. He was able to jog the first 5 miles to his grandmother's house, but then he tired and walked the remaining 2 miles. If the total trip to

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Question 1102955: John can jog twice as fast as he can walk. He was able to jog the first 5 miles to his grandmother's house, but then he tired and walked the remaining 2 miles. If the total trip took 0.75 hours, then what was his average jogging speed?
Answer by josgarithmetic(39631)   (Show Source): You can put this solution on YOUR website!


              SPEED     TIME     DISTANCE

JOG            2r       5/(2r)     5

WALK            r       2/r        2

TOTAL                    0.75









-























---------walking speed

-

-----------jogging speed 

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