A train 275 m long, running with a speed of 90 km / hr will pass a tree in Choose the correct choice from the following answers:  A) 11 sec  B) 15 sec  C) 16 sec  D) 20 sec  E) none

Rationale: "sol . speed = ( 90 x 5 / 18 ) m / sec . = 25 m / sec . time taken = ( 275 x 1 / 25 ) sec = 11 sec answer a"
Answer: A