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Multiple Choice Questions

If 10 boys or 18 girls can do a piece of work in 15 days then 25 boys and 15 girls together will do ...........

Quantitative Aptitude(IBPS RRB CL) Time and work

If 10 boys or 18 girls can do a piece of work in 15 days, then 25 boys and 15 girls together will do twice the work in ?

4.5 days

8 days

9 days

36 days

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Explanation:

10 boys = 18 girls hence 1 boy = 18/10 girls
25 boys + 15 girls = (25 * 18/10) + 15 = 60
now more work more days
more girls less days1 * 60 * x = 2*18*15
or x = (2*18*15)/60 = 9 days

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If 10 boys or 18 girls can do a piece of work in 15 days then 25 boys and 15 girls together will do ...........

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