A boat takes 4 hours to travel 30 kilometer down a river
A boat takes 4 hours to travel 30 kilometer down a river, then 8 hours to return. Determine how fast is the river flowing?
_______ km/hr
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a thin film of mgf2n138 is deposited on glass thus that it is anti reflecting at a wavelength of 580 nanometer under
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a boat takes 4 hours to travel 30 kilometer down a river then 8 hours to return determine how fast is the river flowing
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