A man takes 2.2 times as long to row a distance upstream as to row th…

Question

A man takes 2.2 times as long to row a distance upstream as to row the same distance downstream. If he can row 55 km downstream in 2 hour 30 minutes, what is the speed of the boat in the still water?

Accepted Answer

Option C. 16 km/h. Answer & Solution Answer: Option C Solution: & Speed of the boat in downstream & = 552.5 = 55 × 1025 = 22\,km/hr & Then, speed of the boat in upstream & = 222.2 = 22 × 1022 = 10\,km/hr & Speed of the boat in still water & = 22 + 102 = 16\,km/hr