The speeds of two trains are in the ratio 3 : 1 3:1 3 : 1 , and their lengths are in the ratio 1 : 3 1:3 1 : 3 respectively. When both trains run in o...
Question
The speeds of two trains are in the ratio , and their lengths are in the ratio respectively. When both trains run in opposite directions, they cross each other in $12$ seconds. What are the speeds of the two trains (in m/s)?