a bus covers a certain distance in 3 hours 20 minutes at an average speed of 45 km how long will it take to cover the same distance at a speed of 36 km
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3hrs 20min = 3 1/3 hr for 45 km = 45/3 1/3 = 13.5 km/hr = 36/13.5 = 2 2/3 hrs
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