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Question

A boat can move downstream at 30 km/h and upstream at 18 km/h. If it takes the boatman 10 hours to travel a total of (p +
q) km upstream when the stream current is double the usual, calculate the average of 'p' and 'q'.

A 40 km

B 60 km

C 72 km

D 36 km

E None of these

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