in what time will a train 100 m long cross an electric pole, it its speed be 90 km / hr?  Choose the correct choice from the following options:
A) 2.5 B) 2.9 C) 4 sec D) 2.8 E) 2.1
<gadget id="calculator">10 / 36</gadget>
<output>5/18 = around 0.277778</output>

<gadget id="calculator">90 * (5/18)</gadget>
<output>25</output>

<gadget id="calculator">100 / 25</gadget>
<output>4</output>

<result>C</result>
in what time will a train 100 m long cross an electric pole, it its speed be 90 km / hr?
divide(100, multiply(90, const_0_2778))
"speed = 90 * 5 / 18 = 25 m / sec time taken = 100 / 25 = 4 sec . answer : c"