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Speed of a train is 20km/hr . The strength of the steam was increased two-fold but due to
certain other factors, the friction also increased 1 ½ times. If in the beginning the ratio of the strength of steam and friction was 3:1 . Find the present speed of the train.
(a)40km/hr
(b)30km/hr
(c)45 km/hr
(d)None of these

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TCS Other Question

What should be subtracted from 4^15 so that the remaining is divisible by 31
(a)0
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