A train sets off at 2:00 pm at the speed of 70 km/h. Another train starts at 3:00 pm in the same direction at the rate of 80 km/h. At what time will the second train catch the first train? Choose the correct choice from the following choices
A) 10:00  B) 10:30  C) 11:00  D) 11:30  E) 12:00
In one hour the first train travels 70 km.   The second train catches the first train at a rate of 80 km/h - 70 km/h = 10 km/h.   The second train will catch the first train in   70/10= 
<gadget id="calculator">  70/10</gadget>
<output>7</output>
7 hours, so at 10:00 pm.   The answer is 10:00.
<result>A</result>
A train sets off at 2:00 pm at the speed of 70 km/h. Another train starts at 3:00 pm in the same direction at the rate of 80 km/h. At what time will the second train catch the first train?