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प्रश्न
Two trains, one from Howrah to Patna and 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 speed is.
विकल्प
2 : 03
4 : 03
6 : 07
9 : 06
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उत्तर
4: 03
Explanation:
When train reach after they met in t1 and t2 hr
`("Speed of train I")/("Speed of train II")=sqrt("t"_1/"t"_2)=sqrt(16/9)=4:3`
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