book Maths Puzzle Numerical Ability

A woman invested four times as much at 5% as she did at 6%. The total amount of interest she earns in one year from both accounts is $520. How much did she invest at each rate?

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book Other Question
The sum of three consecutive integers is 87. What are the integers? A rectangle is 7 times as long as it is wide. Its area is 1400cm squared. Find the dimensions of the rectangle in simplest form.