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A lorry averages 55mph for the first 4 hours of a trip and
averages 70 mph for each additional hour. The average
speed for entire trip was 60 mph. How many hours long is
the trip?
a)14 b)12 c)11 d)8 e)6
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Answer Posted / betungurastephen
1 yes
2 e
| Is This Answer Correct ? | 0 Yes | 1 No |
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