the length of the bridge, which a train 180 metres long and travelling at 45 km / hr can cross in 30 seconds, is?
Choose the correct choice from the following answers: A) 876 m B) 157 m C) 195 m D) 156 m E) 167 m
<gadget id="calculator">1_000 / 1</gadget>
<output>1_000</output>

<gadget id="calculator">45 * 1_000</gadget>
<output>45_000</output>

<gadget id="calculator">3_600 / 1</gadget>
<output>3_600</output>

<gadget id="calculator">45_000 / 3_600</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">(25/2) * 30</gadget>
<output>375</output>

<gadget id="calculator">375 - 180</gadget>
<output>195</output>

<result>C</result>
the length of the bridge, which a train 180 metres long and travelling at 45 km / hr can cross in 30 seconds, is?
subtract(multiply(divide(multiply(45, speed(const_1000, const_1)), speed(const_3600, const_1)), 30), 180)
"speed = [ 45 x 5 / 18 ] m / sec = [ 25 / 2 ] m / sec time = 30 sec let the length of bridge be x metres . then , ( 180 + x ) / 30 = 25 / 2 = > 2 ( 180 + x ) = 750 = > x = 195 m . answer : c"