The length of train A is 250 m and the length of train B is 350 m. The speed of the train A is 20 m/sec. Find the speed of the train B if both the trains cross each other in 12 sec.

The length of train A is 250 m and the length of train B is 350 m. The

1.	The length of train A is 250 m and the length of train B is 350 m. The speed of the train A is 20 m/sec. Find the speed of the train B if both the trains cross each other in 12 sec.
A.	25 m/sec
B.	20 m/sec
C.	30 m/sec
D.	24 m/sec
E.	36 m/sec
Answer» D. 24 m/sec