A train leaves Mumabai at 9 am at a speed of 40 kmph. After one hour, another train leaves Mumbai in the same direction as that of the first train at a speed of 60 kmph. When and at what distance from Mumbai do the two trains meet?
Choose the correct choice from the following answers:  A) 187  B) 279  C) 120  D) 278  E) 379
When the second train leaves Mumbai the first train covers 40 * 1= 
<gadget id="calculator">40 * 1</gadget>
<output>40</output>
40 km   So, the distance between first train and second train is 40 km at 10.00am   Time taken by the trains to meet= Distance / relative speed = 40 / (60 -40)= 
<gadget id="calculator">40 / (60 -40)</gadget>
<output>2</output>
2 hours   So, the two trains meet at 12 a.m. The two trains meet 2 * 60= 
<gadget id="calculator">2 * 60</gadget>
<output>120</output>
120 km away from Mumbai.   Answer:120
<result>C</result>
A train leaves Mumabai at 9 am at a speed of 40 kmph. After one hour, another train leaves Mumbai in the same direction as that of the first train at a speed of 60 kmph. When and at what distance from Mumbai do the two trains meet?