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| Math Central | Quandaries & Queries |
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Question from Shahzad, a teacher: a train travels 68 Km at an average speed of 51Km/h. It then travels another 20Km at an average speed of 40Km/h before reaching its destination. Calculate the average speed for the whole journey? |
Hi Shahzad,
On the first part of the trip the train travelled 68 Km at an average speed of 51Km/h. How long did it take?
On the second part of the trip the train travelled 20Km at an average speed of 40Km/h. How long did it take?
The total length of the trip was 68 + 20 = 88 Km. What was the total time for the trip? What was the average speed?
Penny
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