Kak to two boys using one bicycle at the same time and to reach in the shortest possible time the station distance to which 2400 meters if the speed of everyone on foot of 60 m/min and by bicycle of 120 m/min????????????????????? 7


the first floor. will pass ways by bicycle and will leave it for the second, will pass on foot further.


of 1200:120=10 (min.) - by bicycle

of 1200:60=20 (min.) - on foot

of 10+20=30 (min.) - everyone will reach

of 2400:2=1200 (m) the station by p

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