Question 261454: You travel 2 hour at 35 mph, 3 hours at 55 mph and 4 hours at 70 mph. What is your average speed? Found 3 solutions by stanbon, solver91311, palanisamy:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! You travel 2 hour at 35 mph, 3 hours at 55 mph and 4 hours at 70 mph. What is your average speed?
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rate = (total distance)/(total time)
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total distance = 2*35+3*55+4*70 = 515 miles
total time = 2+3+4 = 9 hrs
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rate = 515/9 = 57.22 mph
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Cheers,
Stan H.
If you travel 2 hours at 35 mph, then you travel 70 miles. 3 hours at 55 means you travel 165 miles, and 4 hours at 70 is 280 miles. 70 plus 165 plus 280 is 515 miles. It took 9 hours to travel 515 miles, hence average speed is 515 divided by 9 or just a touch over 57.2 mph.
You can put this solution on YOUR website! You travel 2 hour at 35 mph, 3 hours at 55 mph and 4 hours at 70 mph.
Total distance travelled = 2*35+3*55+4*70
= 70+165+280
= 515 miles
Total time = 2+3+4 = 9 hours
Average speed = 515/9 = 57 2/9 miles/hour
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