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
Answer Posted / betungurastephen
1 yes
2 e
Is This Answer Correct ? | 0 Yes | 1 No |
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