Question
Amit drove for 6 hours at a speed of 60 miles per hour
and for 6 hours at 50 miles per hour. What was his average speed (in miles per hour) for the whole journey?Solution
Distances- =60 mph × 6 hrs. = 360 miles =50 mph 6 hrs. = 300 miles Total distance =360 miles + 300 miles = 660 miles Total time = 6 hrs. + 6 hrs. = 12 hrs. Average speed =660 miles /12 hrs. =55 mph
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