A man can row upstream at 7 kmph and downstream at 10 kmph.Find man's rate in still water and the rate of current?  Choose the correct choice from the following choices:
A) 1.2 km/hr
B) 1.5 km/hr
C) 1.6 km/hr
D) 1.8 km/hr
E) None
Solution   Rate in still water	= 1 / 2 (10 + 7) km/hr   = 8.5 km/hr.   Rate of current	= 1 / 2(10 - 7) km/hr   = 1.5 km/hr.   Answer 1.5 km/hr
<result>B</result>
A man can row upstream at 7 kmph and downstream at 10 kmph.Find man's rate in still water and the rate of current?