Q. Train A crosses a vertical pole at the
speed of 15 m/s in 20 seconds. Speed of
train A is 3 m/s less than the speed of
train B and length of train B is 30 meter
less than length of train A. Find the time
taken by Train B to cross 270 meter long
platform.

• (A) 20 seconds
• (B) 15 seconds
• (C) 30 seconds
• (D) 45 seconds