The current of a stream runs at the rate of 4 km/hr. A boat goes 6 km and back to the starting point in 2 hours. The speed of the boat in still water is ?

The current of a stream runs at the rate of 4 km/hr. A boat goes 6 km

1.	The current of a stream runs at the rate of 4 km/hr. A boat goes 6 km and back to the starting point in 2 hours. The speed of the boat in still water is ?
A.	6 km/hr
B.	7.5 km/hr
C.	8 km/hr
D.	6.8 km/hr
Answer» D. 6.8 km/hr

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