how long does a train 60 m long travelling at 60 kmph takes to cross a bridge of 80 m in length?	Options.
A) 5.8 sec  B) 8.4 sec  C) 12.4 sec  D) 6.8 sec  E) 1.8 sec
<gadget id="calculator">60 + 80</gadget>
<output>140</output>

<gadget id="calculator">10 / 36</gadget>
<output>5/18 = around 0.277778</output>

<gadget id="calculator">60 * (5/18)</gadget>
<output>50/3 = around 16.666667</output>

<gadget id="calculator">140 / (50/3)</gadget>
<output>42/5 = around 8.4</output>

<result>B</result>
how long does a train 60 m long travelling at 60 kmph takes to cross a bridge of 80 m in length?
divide(add(60, 80), multiply(60, const_0_2778))
"b 16.8 sec d = 60 + 80 = 140 m s = 60 * 5 / 18 = 50 / 3 t = 140 * 3 / 50 = 8.4 sec answer is b"