For a final, I am trying to refresh myself about earlymaterial using the followi

Question

For a final, I am trying to refresh myself about earlymaterial using the following problem: Jogging at a constant speed, Miguel can jog 7.5 km in 6minutes less than twice as long as it takes him to jog 4 km. Find Miguel's speed in kilometers per hour. Thanks. For a final, I am trying to refresh myself about earlymaterial using the following problem: Jogging at a constant speed, Miguel can jog 7.5 km in 6minutes less than twice as long as it takes him to jog 4 km. Find Miguel's speed in kilometers per hour. Thanks.

Explanation / Answer

to jog 4 km he takes 4/x hr to jog 7.5 km he takes 7.5/x hr 6 min=6/60 hr =1/10 hr
now by the problem to jog he takes 2*4/x-1/10 so 7.5/x=8/x - 1/10
.5/x=.1 x=1/5

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