4.40 persons take 30 days to complete a work. How long will it take to complete the work. If
20 more persons join them?
20 more persons join them?
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6.6 days is the answer by the equation if x1*y1=x2*y2
x×y=x²×y²
40×30=60×y²
1200/60 = y
20=y
It will take 20 days to complete the work if 20 more persons join them.