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 :	Choose the correct choice from the following:  A) 2 km  B) 2.6 km  C) 3.6 km  D) 4 km  E) None
Sol.   Speed downstream = (15 + 3)= 
<gadget id="calculator">(15 + 3)</gadget>
<output>18</output>
18 kmph.   Distance travelled= [18 * 12/60= 
<gadget id="calculator">18 * 12/60</gadget>
<output>18/5 = around 3.6</output>
3.6 km.   Answer 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 :