pls answer me guys
4 men or 16 boys can do a piece of work in 40 days. In how many days will 3 men and 20
boys do this work?
(1) 20 days (2) 32 days (3) 16 days (4) 25 days (5) None of these
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Answer:
20 days
Step-by-step explanation:
use and/or formula
3×x/4×40 + 20×x/16×40 = 1(complete whole )
3x/160 + 20x/640 = 1
take lcm 640
(12x + 20x)/640 =1
32x = 640
x = 20
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