Speed of a boat in standing water is 11kmph and speed of the stream is 2.5kmph. A man can rows to a place at a distance of 105km and comes back to the starting point. The total time taken by him is? Select
A) 21.12hours B) 20.12hours C) 19.12hours D) 18.12hours E) 17.12hours
Speed upstream = 8.5kmph   Speed downstream = 13.5kmph   Total time taken = 105/8.5 + 105/13.5 = 20.12 hours   Answer is 20.12hours
<result>B</result>
Speed of a boat in standing water is 11kmph and speed of the stream is 2.5kmph. A man can rows to a place at a distance of 105km and comes back to the starting point. The total time taken by him is?