book Maths Puzzle Numerical Ability

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The present age of A and B is in the ratio of 9:7. After 10 years, it would be in the ratio of 7:5. Find their present ages

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book Other Question
If possible, simplify the ratinoal expression.

2x - 3 / 4x - 6 The height of an equilateral triangle is 18 meters. What is its area?