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4 men or 7 children's can do a work in 29 days how many days to go the work finished 12 men and 8 childrens |
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Answer» days=nab/ bc+ad; n=29; a=4, b=7; c=12; d=8;; 4 men can do the work 1 men does in 1 day=1/29×4; amount of work 12 men do in 1 day=12/29×4=3/29; 7 boys can do work in 29 days, = amount of work 1 boy does in 1 day = 1/29 × 7; amount of work 8 boys=8/29×7=8/203; work 12 men and 8 children do in 1 day=3/29+8/203=21+8/203= 1/7; 12men and 8 boys the same work in 7 days 4M=7C=29 days, 12M+8C=?, we know that4M=7Cso12M=21Cmeans21C+8C=? dayswe know7C=29daysso7x29=(21+8) ×? 7x29=29×? ? =7daysyou can take any symbol in the place of ? as:x, y, z7 days is answer. 7 days is the answer of the following |
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