L&T Company Numerical Ability Permutation and Combination

If age of a person is x and his mothers age is 34. then after how many years will the mothers age be twice of the son?

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L&T Other Question

From a vessel 1/3 rd of liquid evaporates on the first day and on the second day 3/4 of the remaining liquid evaporates.what fraction of volume is present at the end of second day? A right circular cylinder and a cone are there. Base radius of cone is equal to radius of cylinder. What is the ratio of height to slant side if their volume are the same?