SOLUTION: a car driving in fog passed a man walking at 3km\hr in a same direction. he could see the car for 4 minute and up to a distance 100 meter .what was speed of the car?

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Question 293156: a car driving in fog passed a man walking at 3km\hr in a same direction. he could see the car for 4 minute and up to a distance 100 meter
.what was speed of the car?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
I think that their relative speed is s+-+3 km/hr
where s is the speed of the car.
The car looks like it's going .1%2F4 km/min
or .1%2F4 km/min x 60 min/hr = 3%2F2 km/hr
s+-+3+=+3%2F2
s+=+9%2F2
The speed of the car is 4.5 km/hr
Hope I got it right