SOLUTION: Mahmood drives the 56km distance between Knutsford and Whitchurch. He then drives a further 59km from Whitchurch to Welshpool. Mahmood's average speed from untsford and Whitchurch

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Mahmood drives the 56km distance between Knutsford and Whitchurch. He then drives a further 59km from Whitchurch to Welshpool. Mahmood's average speed from untsford and Whitchurch      Log On

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Question 1206137: Mahmood drives the 56km distance between Knutsford and Whitchurch. He then drives a further 59km from Whitchurch to Welshpool.
Mahmood's average speed from untsford and Whitchurch was 67.2km/h.
It also took Mahmoud 45 minutes travel from nutsford to Welshpool
Workout Mahmood's average speed (in km/h) for his total journey from nutsford to Welshpool.
Answer by ikleyn(52814) About Me  (Show Source):
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Mahmood drives the 56km distance between Knutsford and Whitchurch.
He then drives a further 59km from Whitchurch to Welshpool.
Mahmood's average speed from untsford and Whitchurch was 67.2km/h.
It also took Mahmoud 45 minutes travel from nutsford to Welshpool
Workout Mahmood's average speed (in km/h) for his total journey from nutsford to Welshpool.
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Find the time driving from Knutsford to Whitchurch.  It is

    56%2F67.2 = 5%2F6 of an hour, or 50 minutes.


The total time driving is 50 minutes + 45 minutes = 95 minutes = 1 hour and 35 minutes, 

    or 135%2F60 hours = 17%2F12 hours = %2812%2B7%29%2F12 hours = 19%2F12 hours.


The total distance from Knutsford to Welshpool is 56 + 59 = 115 kilometers.


The average speed is total_distance%2Ftotal_time = 115%2F%28%2819%2F12%29%29 = %28115%2A12%29%2F19 = 72.632 km/h  (rounded).    ANSWER

Solved.