very easy
Kamis, 06 Januari 2011
A man drives a car fromProbolinggo toJember which the distance is 99 km. The velocity of the car fromProbolinggo toLumajang (45 km fromPr obolinggo) is 67 km/hour. And then he takes a rest inLumajang for 30 minute and continues the travel to jember in 50 km/hour (constant). How many hours has the man drived his car fromProbolinggo to Jember???
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alexandre
di
22.15
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