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Physics 9 Online
OpenStudy (anonymous):

A motorist has to travel 3.5km in the city where his average speed should not exceed 25kph.If he increases his ave speed to 40kph. How much time will he gain in his jouney?

OpenStudy (jfraser):

find out how long it would take to travel 3.5km at 25kph, then recalculate and find the time it would take if he traveled the same distance at 40kph. the time he gains will be the DIFFERENCE between the two times

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