A man starts walking north at 6 ft/s from a point P. Five minutes later, a woman starts walking south at 2 ft/s from a point 500 ft due east of P. At what rate are the people moving apart 30 min after the woman starts walking?(adsbygoogle = window.adsbygoogle || []).push({});

so i was ableto set up a right triangle using the x-y plane (y being north and x being east)

so i was trying to relate the components with distance^2=x^2+y^2

then where i differientate i get dd/dt=dx/dt+dy/dt

i know dy/dt=8 and i want to know dd/dt

there dx/dt=0 becuase there is no change in x.....x is always 500 ft

so would dd/dt=dy/dt=8 ????????

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# Homework Help: Related rates of man walking

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