A man's speed with the current is 22 km/hr and the speed of the current is 5 km/hr. The man's speed against the current is  Choices.
A) 9  B) 10  C) 11  D) 12  E) 13

Rationale: "man ' s rate in still water = ( 22 - 5 ) km / hr = 17 km / hr . man ' s rate against the current = ( 17 - 5 ) km / hr = 12 km / hr . answer : d"
Answer: D