SOLUTION: Two children own two-way radios that have a maximum range of 4 miles. One leaves a certain point at 1:00 P.M., walking due north at a rate of 4 mi/hr. The other leaves the same poi

Question 496130: Two children own two-way radios that have a maximum range of 4 miles. One leaves a certain point at 1:00 P.M., walking due north at a rate of 4 mi/hr. The other leaves the same point at 1:15 P.M., traveling due south at 6 mi/hr. When will they be unable to communicate with one another?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
4 mi/hr x 1/4 hour = 1 mile
n(4+6)=3
10n=3
n=3/10 x 60 min/hr=18 mins
1:15 + 18 mins=1:33 p.m. is when they will last be able to communicate with each other..
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