Select the correct answerA can do a piece of work in 25 days and B can do the same work in 30 days. They work together for 5 days, how much of work is left?Options1126319/301129315/30
Question
Select the correct answerA can do a piece of work in 25 days and B can do the same work in 30 days. They work together for 5 days, how much of work is left?Options1126319/301129315/30
Solution
Sure, let's solve this step by step:
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First, we need to find out how much work A and B can do in a day. A can do 1/25 of the work in a day and B can do 1/30 of the work in a day.
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If they work together, they can do (1/25 + 1/30) of the work in a day. This equals to (30 + 25) / (25 * 30) = 55/750 = 11/150 of the work in a day.
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If they work together for 5 days, they can do 5 * 11/150 = 55/150 = 11/30 of the work.
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So, the amount of work left is 1 (the whole work) - 11/30 = 19/30 of the work.
So, the correct answer is 19/30.
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