The speed of a boat in still water is 15 km/hr and the rate of the current is 3 km/hr. The distance travelled downstream in 12 minutes is	Choose the correct choice.
A) 1.2 km  B) 1.8 km  C) 2.4 km  D) 3.6 km  E) None
Speed Downstream = (15 + 3) km/hr   = 18 km/hr.   Distance travelled = (18 x 12/60) hours   = 3.6km.   Answer 3.6 km
<result>D</result>
The speed of a boat in still water is 15 km/hr and the rate of the current is 3 km/hr. The distance travelled downstream in 12 minutes is