The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 12 minutes is
Pick.
A) 1.2 km
B) 1.8 km
C) 2.4 km
D) 3.6 km
E) 1.6 km
B = 15km/hr, S= 3km/hr, Downstream B+S = 15+3= 
<gadget id="calculator">15+3</gadget>
<output>18</output>
18 km/hr   down stream time t= 12 min, we have to change it to hours so t = 12/60=1/5 hrs.   Distance = Speed*time = 18*1/5= 
<gadget id="calculator">18*1/5</gadget>
<output>18/5 = around 3.6</output>
3.6 km.   ANSWER:3.6 km
<result>D</result>
The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 12 minutes is