Problems on Trains - Data Intensity 2 | Multiple Questions and Answers

What is the length of a running train crossing another 180 metre long train running in the opposite direction?

I.	The relative speed of the two trains was 150 kmph.
II.	The trains took 9 seconds to cross each other.

I alone sufficient while II alone not sufficient to answer

II alone sufficient while I alone not sufficient to answer

Either I or II alone sufficient to answer

Both I and II are necessary to answer

2.	What is the length of a running train?
	I. The train crosses a man in 9 seconds. II. The train crosses a 240 metre long platform in 24 seconds.
	A.	I alone sufficient while II alone not sufficient to answer
	B.	II alone sufficient while I alone not sufficient to answer
	C.	Either I or II alone sufficient to answer
	D.	Both I and II are necessary to answer