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Multiple Choice Questions

Apurva can do a piece of work in 12 days Apurva and Amit complete the work together and were paid Rs...........

Quantitative Aptitude (CDS) Time and work

Apurva can do a piece of work in 12 days. Apurva and Amit complete the work together and were paid Rs. 54 and Rs. 81 respectively.How many days they took to finsh the work together?

24/5 days

23/5 days

24 days

20 days

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Explanation:

Apurva earn Rs. 54 and Amit earn Rs. 81
work capacity is inverse of working days
54:81::1/12 :1/x
54/81=(1/12)/(1/x)
x=(54/81)× 12
x=8
amit will finish work in 8 days
together y(1/8 + 1/12)=1
y=24/5 days

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