Question 670756
Kathleen and cade williams leave simultaneously from the same point hiking in opposite directions, kathleen walking at 4 miles per hour and Cade at 5 mph. How long can they talk on their walkie-talkies if walkie-talkies have a 20-mile radius?
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They are separating at 9 mph.
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time = distance/rate = 20/9 = 2.22 hrs = 2hrs 13 minutes 12 seconds
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Cheers,
Stan H