A TRAIN B SPEEDING WITH 120 KMPH CROSSES ANOTHER TRAIN C RUNNING I...

15. A train B speeding with 120 kmph crosses another train C running in the same direction, in 2 minutes. If the lengths of the trains B and C be 100 m and 200 m respectively, what is the speed (in kmph) of the train C? (1) 111 (2) 123 (3) 127 (4) 129