*/*_A boat moves downstream at the rate of 1 km in 71/2 minutes and upstream at the rate of 5 km an hour. What is the speed of the boat in the still water??

*/*_A boat moves downstream at the rate of 1 km in 71/2 minutes and up

1.	/_A boat moves downstream at the rate of 1 km in 71/2 minutes and upstream at the rate of 5 km an hour. What is the speed of the boat in the still water??
A.	8 km/hour
B.	61/2 km/hour
C.	4 km/hour
D.	31/2 km/hour
Answer» C. 4 km/hour

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*/*_A boat moves downstream at the rate of 1 km in 71/2 minutes and upstream at the rate of 5 km an hour. What is the speed of the boat in the still water??

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/_A boat moves downstream at the rate of 1 km in 71/2 minutes and upstream at the rate of 5 km an hour. What is the speed of the boat in the still water??