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

Answers were Sorted based on User's Feedback



A lorry averages 55mph for the first 4 hours of a trip and averages 70 mph for each additional hou..

Answer / dk mishra

e) 6

Is This Answer Correct ?    5 Yes 0 No

A lorry averages 55mph for the first 4 hours of a trip and averages 70 mph for each additional hou..

Answer / monu jain

answer is 6 hours and 360 miles

55*4 = 220 miles

and as the average speed is 60 then the total distance
should be multiple of 60 only

each additional hour has a average of 70 means we will add
70 in 220 till multiple of 60 is not coming

then 220+70 = 290/6 =48.3 not multiple
then 220+70+70 = 360/6 = 60 multiple

means total distance is of 360 kms and by average speed of
60 it will consume 360/60 = 6 hours

Is This Answer Correct ?    5 Yes 0 No

A lorry averages 55mph for the first 4 hours of a trip and averages 70 mph for each additional hou..

Answer / betungurastephen

1 yes
2 e

Is This Answer Correct ?    0 Yes 1 No

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