Question
"The boat's downstream and upstream speeds are 18 km/hour and 12 km/hour, respectively. A boatman takes 16 hours to cover (p +
"The boat's downstream and upstream speeds are 18 km/hour and 12 km/hour, respectively. A boatman takes 16 hours to cover (p +
q) km upstream when the stream's speed is doubled. What is the average of p and q?"
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