L&T Company Numerical Ability Ratio and Proportion

The ratio of the ages of a man and his wife is 4 : 3, After 4 years, this ratio will be 9 : 7. If at the time of marriage, the ratio was 5 : 3, then how many years ago were they married?

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L&T Other Question

A certain factory employed 600 men and 400 women and the average wage was
Rs. 25.50 per day. If a woman got Rs. 5 less than a man, then what are their daily
wages?
The profit earned by selling an article for Rs. 832 is equal to the loss incurred when the same article is sold for Rs. 448. What should be the sale price for making 50% profit?