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
a)2:3 b)4:3 c)6:7 d)9:16

• b
  ratio of their speed=sq root of (16):sq root of (9)=4:3 ans
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