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 Options
A) 1.6 km  B) 2 km  C) 3.6 km  D) 4 km  E) None of these
Explanation:   Speed downstreams	=(15 + 3)= 
<gadget id="calculator">(15 + 3)</gadget>
<output>18</output>
18 kmph.   Distance travelled= (18 x 12/60)km   = 3.6km   Option 3.6 km
<result>C</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