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# ps

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ps [#permalink]  09 Apr 2006, 06:34
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A boy walking along a road at 3 kilometers per hour is overtaken by a truck traveling at 40 kilometers per hour. If the truck breaks down 1 kilometer beyond where it passes the boy, how many minutes after the breakdown does the boy reach the truck?
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Truck speed 40km/h => 1/40 * 60 = 1.5 min it will travel 1 km
Boy speed 3km/h => 1/3 * 60 = 20 min it will travel 1 km

as both started same time 20-1.5=18.5 min it will take boy to reach truck
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PS 2 09 Jun 2005, 12:26
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ps 5 06 May 2005, 19:13
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