Question 1206137
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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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<pre>
Find the time driving from Knutsford to Whitchurch.  It is

    {{{56/67.2}}} = {{{5/6}}} of an hour, or 50 minutes.


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

    or 1{{{35/60}}} hours = 1{{{7/12}}} hours = {{{(12+7)/12}}} hours = {{{19/12}}} hours.


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


The average speed is {{{total_distance/total_time}}} = {{{115/((19/12))}}} = {{{(115*12)/19}}} = 72.632 km/h  (rounded).    <U>ANSWER</U>
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Solved.