Question

Twenty workers can finish a piece of work in35 days .After how many days should 4 worlers leave the job so that the work is completed in40 days

Answer 1

Answer:

15 Days

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Step-by-step explanation:

Let say after x days 4 workers left

then for x days  20 workers worked

for 40-x days  16 (20-4) workers worked

20*35 = 20*x + 16*(40-x)

700 = 20x + 640 -16x

60 = 4x

x = 15

x = 15