A boat running upstream takes 7 hours and 40 minutes to cover a certain distance while it takes 5 hours to cover the same distance downstream. What is the ratio between the speed of the current and speed of the boat respectively?

A boat running upstream takes 7 hours and 40 minutes to cover a certai

1.	A boat running upstream takes 7 hours and 40 minutes to cover a certain distance while it takes 5 hours to cover the same distance downstream. What is the ratio between the speed of the current and speed of the boat respectively?
A.	13: 4
B.	17: 4
C.	19: 4
D.	4: 19
Answer» E.

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