The current of a stream runs at the rate of 4 kmph. A boat goes 6 km and back to the starting point in 2 hours,then find the speed of the boat in still water?
10 kmph
21 kmph
8 kmph
12 kmph
Explanation:
S = 4
M = x
DS = x + 4
US = x - 4
6/(x + 4) + 6/(x - 4) = 2
x = 8
S = 4
M = x
DS = x + 4
US = x - 4
6/(x + 4) + 6/(x - 4) = 2
x = 8