A motorboat can go 10 miles downstream on a river in 20 min. It takes 30 min for this boat to go back at the same 10 miles. Find the speed of the current ?

A motorboat can go 10 miles downstream on a river in 20 min. It takes

1.	A motorboat can go 10 miles downstream on a river in 20 min. It takes 30 min for this boat to go back at the same 10 miles. Find the speed of the current ?
A.	8 m/h
B.	5 m/h
C.	7 m/h
D.	6 m/h
Answer» C. 7 m/h

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A motorboat can go 10 miles downstream on a river in 20 min. It takes 30 min for this boat to go back at the same 10 miles. Find the speed of the current ?

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