A is twice efficient as B and together they do the same work in as much time as C and D together. If C and D can complete the work in 20 and 30 daysrespectively, working alone ,then in how many days A can complete the work individually:
A) 12 days B) 18 days C) 24 days D) 30 days
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Answer:
18 days
Step-by-step explanation:
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Answered by
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Step-by-step explanation:
c=20
d=30
c=20×2=40
d=30×2=60
d-c=60-40=20
A+2=B
A+2=20
A=20-2=18
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