a train is 410 meter long is running at a speed of 45 km / hour. in what time will it pass a bridge of 140 meter length Options.
A) 20 seconds	B) 44 seconds	C) 40 seconds	D) 50 seconds	E) none of these
<gadget id="calculator">410 + 140</gadget>
<output>550</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">550 / (25/2)</gadget>
<output>44</output>

<result>B</result>
a train is 410 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(410, 140), divide(multiply(45, const_1000), const_3600))
"explanation : speed = 45 km / hr = 45 * ( 5 / 18 ) m / sec = 25 / 2 m / sec total distance = 410 + 140 = 550 meter time = distance / speed = 550 ∗ 2 / 25 = 44 seconds option b"