Three workers can do a job in 12 days. Two of the workers work twice as fast as the third. How long would it take one of the faster workers to do the job himself ?

Created: 7 years ago | Updated: 1 month ago

Updated: 1 month ago

None of these

Bangladesh Bank Bangladesh Bank - Officer - 2001 গণিত সময় ও কাজ (Time and work)

Des

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Best Ans:

Let 1st worker can complete the work in t days

2nd worker can complete the work in t days

3rd worker can complete the work in 2t day

ATQ

(t×t×2t)/(t^2 + 2t^2 + 2t^2) = 12

2t^3/5t^2 = 12

t = 60/2 = 30

Faster worker (1st or 2nd worker) any of them can complete the whole work in 30 days

Ans. 30 days

7 years ago

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Md Azizur Rahman

FOUNDER OF SATT

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