20 men can complete the work in 40 days. When should 4 men leave so that the work may be
finished in 45 days
(
Aday's
(B..8 days
(C) 6 days
(D) 10 days
Answers
Answer:
The answer is 15 days.
Step-by-step explanation:
20 men can complete a work in 40 days.
Total men days work
= 20 men × 40 days.
= 800 men days
When should 4 men leave so that the work may be finished in 45 days?
Now 4 men leave thus men available = 20 men - 4 men = 16 men
16 men will work for 45 days
The work completed by 16 men
= 16 × 45
= 720 men-days of work.
Remaining work = 800 men days - 720 men days = 60 men-days
These 60 men days work will be done by 4 men.
No of days required to finish the work
= 60 men - days / 4 men
= 15 days
20 men can complete a work in 40 days.
Total men days work
= 20 men × 40 days.
= 800 men days
When should 4 men leave so that the work may be finished in 48 days?
Now 4 men leave thus men available = 20 men - 4 men = 16 men
16 men will work for 48 days
The work completed by 16 men
= 16 × 48
= 768 men-days of work.
Remaining work = 800 men days - 768 men days = 32 men-days
This 32 men days work will be done by 4 men.
No of days required to finish the work
= 32 men - days / 4 men
= 8 days