Question

A job can be completed by 12
men in 12 days. How many ex-
tra days will be needed to com-
plete the job if 6 men leave after
working for 6 days?
(1) 3 days (2) 6 days
(3) 12 days (4) 24 days​

Answer 1

Answer:

s1q

Step-by-step explanation:

6 more days required

Answer 2

Answer:

6 days will be needed to complete the job

Step-by-step explanation:

Given that a job can be completed by 12 men in 12 days

Total job = 144 man days work

1 men 1 day work = 1 man day

12 men 1 day work = 12 man days

12 men 6 days work = 72 man days

Work left after 6 days = (144 - 72) man days = 72 man days

Given that 6 men left after 6 days

Men left = 12 - 6 = 6 men

6 man days work by 6 men takes 1 day

72 man days work by 6 men will take = \frac {72}{6} = 12 days

Total days initially = 12

Days left after 6th day= 12 - 6 = 6

Days needed after 6th day to complete remaining work = 12

Hence, extra days needed = 12 - 6 = 6 days

Thus, 6 days will be needed to complete the job