The length of a train is one-third of the length of platform A, and the speed of the train is 90 km/hr. If the train can cross platforms A and B in 24 and 12 seconds, then find the length of platform B.

Correct option is E

Let the length of the train be x meter
The length of the platform A = 3x meter
ATQ,

Let the length of the platform B be b meter

150+b=25×12
b=300-150
b=150