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  Pick one:
A) 1.2 km
B) 1.8 km
C) 2.4 km
D) 3.6 km
E) none
<gadget id="calculator">12 / 60</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">15 + 3</gadget>
<output>18</output>

<gadget id="calculator">(1/5) * 18</gadget>
<output>18/5 = around 3.6</output>

<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
multiply(divide(12, const_60), add(15, 3))
"speed downstream = ( 15 + 3 ) km / hr = 18 km / hr . distance travelled = ( 18 x 12 / 60 ) hours = 3.6 km . answer d"