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 64 hours respectively. The ratio of their speeds is? Select:	A) 4 : 5	B) 8 : 3	C) 8 : 4	D) 4 : 8	E) 4 : 1

Rationale: let us name the trains a and b . then , ( a ' s speed ) : ( b ' s speed ) = √ b : √ a = √ 64 : √ 9 = 8 : 3 answer : b
Answer: B