Two cyclists P and Q cycle at 20 km/hr and 25 km/hr towards each other. What was the distance (in kms) between them when they started if they met after 56 minutes?
42
Moving towards each other, relative speed \(=20+25=45\) km/hr.
Time \(=56\) min \(=\tfrac{56}{60}=\tfrac{14}{15}\) hr.
\[\text{Distance}=45\times\tfrac{14}{15}=3\times 14=42\text{ km}\]
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