A 110 m long train takes 3 seconds to pass a pole. How long is the platform if the train passes it in 15 seconds?

440 m

110 m long train takes 3 seconds to pass a pole

Speed = 110/3 m/sec

The same train passes the platform in 15 seconds,

distance travelled = 15*110/3 = 550m

The distance = length of platform + length of train

550 = length of platform + 110

length of platform = 440 m

The correct answer is Option (1) → 440 m