book Maths Puzzle Numerical Ability

The ages of the two brothers are in the ratio of 5:4. Four years ago their ages were in the ration of 11:8, find their present ages.

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book Other Question

What is the square root of 25a^2B^2 A rectangle has a diagonal whose length is x. The rectangle is twice as long as it is wide. What is the area of the rectangle in terms of x?