The downstream speed of a boat is 42 km/hr and the speed of current is – McqOptions

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1.	The downstream speed of a boat is 42 km/hr and the speed of current is 3 km/hr. What is the total time (in hours) taken by the boat to cover 72 km upstream and 84 km downstream?
A.	3
B.	4
C.	5
D.	6
Answer» C. 5

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