Two trains each 260 m in length are running on the same parallel lines in opposite directions with the speed of 80 kmph and 70 kmph respectively. In what time will they cross each other completely? Choose the most appropriate option:
A) 15 sec  B) 19 sec  C) 12.48 sec  D) 10 sec  E) 11 sec
Explanation:   D = 260 m + 260 m = 520 m   RS = 80 + 70= 
<gadget id="calculator">80 + 70</gadget>
<output>150</output>
150 * 5/18= 125/3   T = 520 * 3/125= 
<gadget id="calculator">520 * 3/125</gadget>
<output>312/25 = around 12.48</output>
12.48 sec   Answer: Option 12.48 sec
<result>C</result>
Two trains each 260 m in length are running on the same parallel lines in opposite directions with the speed of 80 kmph and 70 kmph respectively. In what time will they cross each other completely?