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makvit [3.9K]
2 years ago
14

A train travels 98 kilometers in 1 hours, and then 78 kilometers in 3 hours. what is its average speed?

Physics
1 answer:
ozzi2 years ago
7 0

The average speed over the total four hour interval is

\dfrac{98\,\mathrm{km}+78\,\mathrm{km}}{4\,\mathrm h}=31\,\dfrac{\mathrm{km}}{\mathrm h}

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