exam Maths Puzzle Numerical Ability

parts of two identical circles are shown.A and B are centres of each of the circle.the two circles meet at C and D such in a way that it forms a rhombus ABCD WITH AREA 48CM^2.THE l

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exam Other Question

One person can do a certain job in twenty-one minutes, and another person can do the same job in twenty-eight minutes. How many minutes will it take them to do the job altogether? One third of a number is 2 more than one-sixth of the same number. What is the number?

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Suppose Stephanie walks D mi at R mph in the same time that wally walks d mi at r mph. Give an equation relating D,R,d, and r.