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Alice leaves her house driving east at 45 miles per hour Thirty minutes later her husband Dave notices she forgot her cell phone and sets off after her How fast must Dave travel in order to catch up?
Wiki User
∙ 13y ago
In 30 min she would have traveled 22.5 miles so if you wanted to catch up to her in 30 min you would have to travel twice her hourly rate which would be 90 miles per hour
Dave will catch Alice if he travels at any speed greater than she does, that is if he drives at any speed greater than 45mph.
The factor which changes is the time it takes Dave to catch Alice (assuming they both keep driving at their relevant speeds):
at 46mph, he will take 22.5/1 = 22 1/2 hours to catch her;
at 55mph, he will take 22.5/10 = 2 1/4 hours to catch her;
at 70mph, he will take 22.5/25 = 54 minutes to catch her.
Wiki User
∙ 13y ago
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Alice leaves her house driving east at 45 miles per hour Thirty minutes later her husband Dave notices she forgot her cell phone and sets off after her How fast must Dave travel in order to?
C. 52.5 mphDave's rate = dist/time = 157.5/3 = 52.5 mphLiaqat Ali
Alice leaves her house driving east at 45 miles per hour mph Thirty minutes later her husband Dave notices she forgot her cell phone and sets off after her How fast must Dave travel in order to?
dave just needs to drive faster than 45 miles per hour and he will catch her sooner or later.. depending on how much time he has to catch her tells the exact speed he has to go..
How do you round to the nearest quarter hour?
Seven minutes, thirty seconds to twenty-two minutes, twenty-nine seconds rounds to :15 Twenty-two minutes, thirty seconds to thirty-seven minutes, twenty-nine seconds rounds to :30 Thirty-seven minutes, thirty seconds to fifty-two minutes, twenty-nine seconds rounds to :45 Fifty-two minutes, thirty seconds to seven minutes, twenty-nine seconds rounds to the hour.
How many minutes are in one hour and thirty minutes?
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Alice leaves her house driving east at 45 miles per hour Thirty minutes later her husband Dave notices she forgot her cell phone and sets off after her How fast must Dave travel in order to?
C. 52.5 mphDave's rate = dist/time = 157.5/3 = 52.5 mphLiaqat Ali
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Alice leaves her house driving east at 45 miles per hour mph Thirty minutes later her husband Dave notices she forgot her cell phone and sets off after her How fast must Dave travel in order to?
dave just needs to drive faster than 45 miles per hour and he will catch her sooner or later.. depending on how much time he has to catch her tells the exact speed he has to go..
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16 x 2 = 32 mph
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Seven minutes, thirty seconds to twenty-two minutes, twenty-nine seconds rounds to :15 Twenty-two minutes, thirty seconds to thirty-seven minutes, twenty-nine seconds rounds to :30 Thirty-seven minutes, thirty seconds to fifty-two minutes, twenty-nine seconds rounds to :45 Fifty-two minutes, thirty seconds to seven minutes, twenty-nine seconds rounds to the hour.
How do you round to the nearest quarter hour?
Seven minutes, thirty seconds to twenty-two minutes, twenty-nine seconds rounds to :15 Twenty-two minutes, thirty seconds to thirty-seven minutes, twenty-nine seconds rounds to :30 Thirty-seven minutes, thirty seconds to fifty-two minutes, twenty-nine seconds rounds to :45 Fifty-two minutes, thirty seconds to seven minutes, twenty-nine seconds rounds to the hour.
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