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Two trains each having length of 160 met...

Two trains each having length of 160 meters moving in opposite direction crossed each other in 9 seconds. If one train crossed a 200 meters long platform in 18 seconds, then the ratio of the speeds is:
विपरीत दिशा में चलते हुए 160 मीटर लम्बाई वाली दो ट्रेनें एक-दूसरे को 9 सेकंड में पार करती है। यदि एक ट्रेन 18 सेकंड में 200 मीटर लंबे प्लेटफार्म को पार करती है, तो इनकी गति का अनुपात है:

A

`2:3`

B

`9:7`

C

`5:8`

D

`3:4`

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