Two trains, one from Howrah to Patna and the other from Patna to Howrah, start simultaneously. After they meet, the trains reach their destinations after 9 hours and 16 hours respectively. The ratio of their speeds is Options
A) 4 : 9  B) 4 : 3  C) 4 : 12  D) 4 : 8  E) 4 : 5

Rationale: "let us name the trains as a and b . then , ( a ' s speed ) : ( b ' s speed ) = b : a = 16 : 9 = 4 : 3 . answer : b"
Answer: B