A man walks at a certain speed and reaches destination in 1 hr 40 minutes which is 6 km far. If he covers the same distance in 1 hr 20 minutes, what is the difference in speed?( In km/hr)
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A man walks at a certain speed and reaches destination in 1 hr 40 minutes which is 6 km far. If he covers the same distance in 1 hr 20 minutes, what is the difference in speed?( In km/hr)