A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is:
Choose the correct answer.
A) 8.5 km/hr	B) 8 km/hr	C) 9 km/hr	D) 10 km/hr	E) 7 km/hr
Man's rate in still water = (15 - 2.5) km/hr = 12.5 km/hr.   Man's rate against the current = (12.5 - 2.5) km/hr = 10 km/hr.   ANSWER:10 km/hr
<result>D</result>
A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is: