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:	Select the correct option:	A) 8.5 km/hr	B) 9 km/hr	C) 10 km/hr	D) 12.5 km/hr	E) 25km/hr
Explanation:   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>C</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: