Asked by Lindy

Frances walks half the distance at 5km/h and ru the other half at 10km/hit the total time for her journey is 3 hours,what is the distance

Answers

Answered by Steve
since time = distance/speed,

(d/2)/5 + (d/2)/10 = 3
d = 20

check:

10/5 + 10/10 = 2+1 = 3 hrs
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