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A car averages 55 mph for the first 4 hours of a trip and
averages 70 mph for each additional hour. The average speed
for the entire trip was 60 mph. How many hours long is the trip?
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Answer Posted / shobhit awasthi
It's very simple
When we calculate we will find that
55*4=220
and
also
70*2=140
and as question said that the average speed is 60 so
220+140=360/6=60 that's it
No other option is satisfying the average speed condition.
| Is This Answer Correct ? | 8 Yes | 5 No |
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