Because to convert from metres / sec to kilometres per hour, we multiply the metres per second by 3,600 to get to metres per hour, and divide the product by 1,000 to get from metres per hour to kilometres per hour, so, overall, that’s a factor of 3,600/1000 which simplifies to 18/5. Using 18/5 is great for mental arithmetic. Multiply by 3.6 if you can handle that mentally…
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Answer:
Because to convert from metres / sec to kilometres per hour, we multiply the metres per second by 3,600 to get to metres per hour, and divide the product by 1,000 to get from metres per hour to kilometres per hour, so, overall, that’s a factor of 3,600/1000 which simplifies to 18/5. Using 18/5 is great for mental arithmetic. Multiply by 3.6 if you can handle that mentally…
Step-by-step explanation:
1000m =1km
3600 sec = 1 hr