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Quantity I: The speed of the stream is 3...

Quantity I: The speed of the stream is 3 km/hr. A boat goes 30 km oupstream and comes back again to the starting point in 175 min. Then sped of the boat in still water ( in km/hr):
Quantity II: A man in a car travels a certain distance in 20 min. He observes that he corossed 8 bus stops. If distance between two bus stops are 1000m, then the speed at which the car is travelling (in km/hr)

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