A train `100 m` long travelling at `40 ms^(-1)` starts overtaking another train `200 m` long travelling at `30 ms^(-1)`. The time taken by the forst train to pass the second train comletely is .

A train of 100 m long travelling at 40 m/s starts overtaking another train 200 m long travelling at 30 m/s . The time taken by the first train to pass the second train completely is

A train 100m long travelling at 40 m/s starts overtaking another train 200 m long travelling at 30m/s in the same direction. The time taken by the first train to pass the second train completely is :

A car 2 m long travelling at 30 ms^(-1) overtakes another car 4 m long travelling at 20 ms^(-1) . The time taken by the first car to pass the second car is

A car 2 m long travelling at 30 ms^(-1) overtakes another car 4 m long travelling at 20 ms^(-1) . The time taken by the first car to pass the second car is

A train of length 200 m traveling at 30 ms ^(-1) overtakes another train of length 300 m traveling at 20 ms ^(-1). The time taken by the first train to pass the second is

A train of length 200 m traveling at 30 ms ^(-1) overtakes another train of length 300 m traveling at 20 ms ^(-1). The time taken by the first train to pass the second is

A train of 100 m length moves with 40 m/s and overtakes another train of 200 m length moves with 30 ms^(-1). Time taken by 1^(st) train to overtake another train is ......