Question
The duration needed to travel (x – 36) km upstream
equals the time taken to go (2x – 72) km downstream. If the boat’s speed is 10.5 km/h and the current flows at 1.5 km/h, calculate the value of x.Solution
ATQ,
(x – 36)/(10.5 – 1.5) = (2x – 72)/(10.5 + 1.5)
(x – 36)/9 = (2x – 72)/12
12x – 432 = 18x – 648
6x = 216
x = 36
So, the value of ‘x’ is 36 km.
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