If i drive 210 miles, how long will the journey take if i drive at anaverage speed of 20 m.P.H. For 120 miles and an average speed of30 m.P.H. For 90 miles, and have a 60 minute stop forrefreshments mid-way through the journey?
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The journey will take 10 hours.
Total distance = 210 miles (Given)
Speed = 20mph = 120 miles (Given)
Speed = 30mph = 90 miles (Given)
For an average speed of 20 km/hr for a distance of 120 km
Time = Distance /Speed
= 120/20
= 6 hrs
For an average speed of 30 km/hr for a distance of 90 km
= 90/30
= 3 hrs
Time taken for refreshment = 60 Minutes = 1 Hr
Therefore,
Total Time = 6 + 3 + 1
= 10 hrs
Hence, the journey will take a total of 10 hrs
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