Question

9 men can do a work in 12 days working 4 hours a day. in how many days can 6 men do the same work, working 8 hours a day?

a. 18

b. 9

c. 10

d. 8

Answer 1

hope this answer helps you

Answer 2

Answer:  b. 9

Step-by-step explanation:

Let d be the number of days it took to complete the work if 6 men do the same work, working 8 hours a day

If M1 men can do the work in working H1 hours per day and M2 men can do  the same work in working H2 hours per day, then

${M_1H_1}={M_2H_2}\\\\\Rightarrow\ {9\times12\times4}=6\times8\times d\\\\\Rightarrow d=\frac{9\times12\times4}{48}\\\\\Rightarrow d=9\ days$