in what time will a train 180 m long cross an electric pole, it its speed be 144 km / hr?
Select:
A) 2.5 sec
B) 1.9 sec
C) 8.9 sec
D) 4.5 sec
E) 2.9 sec
<gadget id="calculator">10 / 36</gadget>
<output>5/18 = around 0.277778</output>

<gadget id="calculator">144 * (5/18)</gadget>
<output>40</output>

<gadget id="calculator">180 / 40</gadget>
<output>9/2 = around 4.5</output>

<result>D</result>
in what time will a train 180 m long cross an electric pole, it its speed be 144 km / hr?
divide(180, multiply(144, const_0_2778))
"speed = 144 * 5 / 18 = 40 m / sec time taken = 180 / 40 = 4.5 sec . answer : d"