A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water ?

Arithmetic Aptitude

1)	A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water ?

A) 5 km./hr
B) 5.5 km/hr
C) 6 km/hr
D) 7 km.hr

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