SOLUTION: two cars leave at the same point .the speed of the car is 75 kph and the other one is25 kph.at what time will they be 200 km apart?

Question 170683: two cars leave at the same point .the speed of the car is 75 kph and the other one is25 kph.at what time will they be 200 km apart?
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
Lots of ways to look at this one, but the way I prefer is to look at the difference in their two speeds. They are both going the same direction, so the difference between the two is

How long does it take to go 200km at 50kph?

So after 4 hours they are 200 km apart. at the four hour mark, one car is

The other car is

SO they are 200 apart

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