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Arithmetic and Algebra Word Problems
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A can do a piece of work in 10 days which can be done by B in 12 days. How long would it take to do the work together?
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A
5 5/11
💡 Explanation:
A's rate is 1/10 and B's rate is 1/12. Combined rate = 1/10 + 1/12 = (6+5)/60 = 11/60. The time taken together is the reciprocal: 60/11 = 5 5/11 days. Other options represent calculation errors in the common denominator or reciprocal.