A man can row upstream at 45km/hr and down stream at 36km/hr find mans rate of the current ? Choose the correct choice from the following
A) 6.3km/hr	B) 9.6km/hr	C) 4.5km/hr	D) 5.9km/hr	E) 9.8km/hr
given upstream(u) =45km/hr   down stream (v)= 36km/hr rate of the current =1/2(u-v) =1/2(45-36)=4.5km/hr   Answer is (4.5km/hr)
<result>C</result>
A man can row upstream at 45km/hr and down stream at 36km/hr find mans rate of the current ?