Question
A man takes a total time of 5 hours to cover 36 km
downstream and 18 km upstream, while the man takes the same time to cover 54 km downstream and 12 km upstream. Find the speed of boat downstream.Solution
Let the downstream speed and upstream speed be x km/hr and y km/hr, respectively. According to question, 36/x + 18/y = 5 -----(1) 54/x + 12/y = 5 -----(2) Solving (1) and (2), we get x = 18 km/hr and y = 6 km/hr So, downstream speed = 18 km/hr
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