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Mathematics, 06.12.2020 21:20 nkaliloa

Peter left city a at 9:00 am towards city b at an average speed of 50 mph. Thirty minutes later Emily also leaves city a towards city b. What should be the average speed of Emily if she has to catch-up with peter at 11:30 am?

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Peter left city a at 9:00 am towards city b at an average speed of 50 mph. Thirty minutes later Emil...
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