A boat rowing at the speed of 24 kmph and the speed of stream is 6 kmph. If the boat covers a certain distance upstream and downstream in 32 hours, then find the distance?
A.280 km
B.300 km
C.320 km
D.360 km
E. None of these
Sol:
Speed of boat in still water = 24 kmph
Speed of stream = 6 kmph
Downstream speed = 24 + 6 = 30 kmph
Upstream speed = 24 – 6 = 18 kmph
Distance = D
D/30 + D/18 = 32
3D + 5D = 90 * 32
D = 360 km
