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5 persons working eight hours daily can complete a wall in 10 days. When they have Worked for 4 days, 5 more persons are brought to work. The wall can now be completed in?
Answers
hope this helps you
regards nishita
5 persons take 10 days
⇒ 1 day = 1/10
Amount of work completed after 4 days:
1 day = 1/10 of the work
4days = 1/10 x 4 = 2/5 of the work
Find the remaining of the work:
Remaining = 1 - 2/5 = 3/5 of the work
Number of persons after 5 more joined in:
Number of people = 5 + 5 = 10
Find the number of days 10 people need to finish the work:
5 people take 10 days
1 person take 10 x 5 = 50 days
10 people = 50 ÷ 10 = 5 days
Find the amount of work 10 people can do in a day:
10 people can complete teh work in 5 days
⇒ 1 day = 1/5 of the work
Find the number of days needed for the 10 people to complete the rest of the work:
1/5 of the work = 1 day
3/5 of the work = 1 x 3 = 3 days
Find the total number of days needed altogether:
Number of days = 4 + 3 = 7 days
Answer: The wall can be completed in 7 days.