Two bikers A and B start and ride at 75 km/hr and 60 km/hr respectively towards each other. They meet after 20 minutes. How far (in km) were they from each other when they started?
In 20 min they will go total =Â $$\frac{75}{60}\times20+\frac{60}{60}\times20=25+20=45\ km\ .$$
B is correct choice.
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