book Maths Puzzle Numerical Ability

The length of a wire bent intoa rectangle is twice its breadth. If this rectangle is turned into a circle, the circumference becomes 77 cm. Find the length and breadth of the rectangle

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5/ 3 * 2/ 3 =? Zal is paid $18 an hour for a 40-hour workweek, but is paid time and a half for overtime work. Give expressions for Zal's pay if he works t hours during a month?