In what time will two trains cross each other completely, which are running on the same parallel lines in opposite directions, each train running with a speed of 60 kmph being 130 m and 120 m in length respectively?
Select the correct option:
A) 6.9 sec B) 7.1 sec C) 7.2 sec D) 7.4 sec E) 7.5 sec
D = 130m + 120m = 250m * 1/1000 130  + 120= 
<gadget id="calculator">130  + 120</gadget>
<output>250</output>
250m * 1/1000 = 0.25 kms   RS 250  * 1/1000= 
<gadget id="calculator">250  * 1/1000</gadget>
<output>1/4 = around 0.25</output>
0.25 kms   RS= 60 + 60= 
<gadget id="calculator">60 + 60</gadget>
<output>120</output>
120 kmph   T= (0.25/120) * 3600= 
<gadget id="calculator">(0.25/120) * 3600</gadget>
<output>7.5</output>
7.5 sec   ANSW7.5 secR:7.5 sec
<result>E</result>
In what time will two trains cross each other completely, which are running on the same parallel lines in opposite directions, each train running with a speed of 60 kmph being 130 m and 120 m in length respectively?