A boat moves downstream at the rate of one km in 10 minutes and upstre – McqOptions

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1.	A boat moves downstream at the rate of one km in 10 minutes and upstream at the rate of 4 km an hour. What is the velocity of the current?
A.	3 km/hr
B.	5 km/hr
C.	1 km/hr
D.	None of these
Answer» D. None of these

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