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 50 kmph. When and at what distance from Mumbai do the two trains meet? Choose the correct choice from the following answers:
A) 111 B) 771 C) 200 D) 873 E) 811
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 / (50 -40)= 
<gadget id="calculator">40 / (50 -40)</gadget>
<output>4</output>
4 hours   So, the two trains meet at 2 p.m. The two trains meet 4 * 50= 
<gadget id="calculator">4 * 50</gadget>
<output>200</output>
200 km away from Mumbai.   Answer: 200
<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 50 kmph. When and at what distance from Mumbai do the two trains meet?