A man speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man speed against the current is  Choose the correct choice from the following answers:
A) 7 km/hr [B] [C] [D]
B) 8 km/hr
C) 9 km/hr
D) 6 km/hr
E) 10 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>E</result>
A man speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man speed against the current is