1. A train X leaves Howrah at 6 a.m. and reaches Asansol at 10 a.m. Another train Y leaves Asansol at 8 a.m. and reaches Howrah at 11.30 a.m. The two trains cross one another at





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  • By: anil on 05 May 2019 02.25 am
    Time taken by train X to reach destination = 4 hours and time taken by train Y = 3.5 hours Let distance between Howrah and Asansol = L.C.M. (4,3.5) = 28 km => Speed of train X = $$frac{28}{4}=7$$ km/hr and speed of train Y = $$frac{28}{3.5}=8$$ km/hr If the two trains meet after $$t$$ hours from 6 a.m., then => $$7t+8(t-2)=28$$ => $$15t=28+16=44$$ => $$t=frac{44}{15}$$ hours => $$t=frac{44}{15} imes60=176$$ minutes = 2 hours 56 minutes $$ herefore$$ The two trains cross one another at = 8.56 a.m. => Ans - (B)
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