Question : A can do 20% of a job in 7 days and B can do 25% of the job in 7 days if they worked alone. How much of the job (in percentage) can they complete in 7 days if they worked together?
Option 1: 38%
Option 2: 52%
Option 3: 56%
Option 4: 45%
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Correct Answer: 45%
Solution : Given: A can do 20% of a job in 7 days. B can do 25% of the job in 7 days. So, in 7 days, both A and B together will finish $45$% of the work. Hence, the correct answer is 45%.
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Question : A and B together can complete a piece of work in 12 days. They worked together for 5 days and then A alone finished the rest of the work in 14 days. A single person can complete the work in:
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