A train 110 m long running at 52 kmph crosses a platform in 30 sec. What is the length of the platform? Choose the correct choice from the following choices:
A) 287 B) 398 C) 323 D) 245 E) 267

Rationale: "d = 52 * 5 / 18 = 30 = 433 â € “ 110 = 323 answer : c"
Answer: C