Bricklayers

Eight bricklayers build a house for 630 days. How many bricklayers must be added after 150 days to complete the building in (next) 320 days?

Correct answer:

n =  4

Step-by-step explanation:

a=8 m=630 a=630 8=5040  a 150/m+(n+a) 320/m=1  a 150+(n+a) 320=m 8 150+(n+8) 320=5040  320n=1280  n=3201280=4  n=4



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