a train is 435 meter long is running at a speed of 45 km / hour. in what time will it pass a bridge of 140 meter length Choose one.
A) 20 seconds  B) 30 seconds  C) 46 seconds  D) 50 seconds  E) none of these
<gadget id="calculator">435 + 140</gadget>
<output>575</output>

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

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

<gadget id="calculator">575 / (25/2)</gadget>
<output>46</output>

<result>C</result>
a train is 435 meter long is running at a speed of 45 km / hour. in what time will it pass a bridge of 140 meter length
divide(add(435, 140), divide(multiply(45, const_1000), const_3600))
"explanation : speed = 45 km / hr = 45 * ( 5 / 18 ) m / sec = 25 / 2 m / sec total distance = 435 + 140 = 575 meter time = distance / speed = 575 ∗ 2 / 25 = 46 seconds option c"