If 10 men can construct a building in 40 days. How long will it take 20 men to do this work?
Answer: 20 days
Explanation
This is a classic inverse proportion problem:
More men → Less time required.
Given:
-
10 men take 40 days
-
20 men will take ? days
Since the number of men and the number of days are inversely proportional:
Men1×Days1=Men2×Days210×40=20×x 400=20x⇒x=400/20=20
This question appeared in
Past Papers (4 times)
FPSC 5 Years Past Papers Subject Wise (Solved With Details) (1 times)
FPSC Past Papers (1 times)
Inspector Customs, Intelligence Officer Past Papers, Syllabus (2 times)
This question appeared in
Subjects (1 times)
MATHS MCQS (1 times)
Related MCQs
- 20 men can construct a building in 40 days. How long will it take 10 men to do this work?
- 120 men are used to build huge building for 30 days. How long will it take 80 men to do the same work?
- X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone, and then after 4 days, Y joined him until the completion of the work. How long did the work last?
- If 10 men can construct a 75 km long road in 5 days. How many days will be needed for 15 men to construct a 45 km long road?
- P and Q can complete a work in 15 days and 10 days respectively. They started the work together and then Q left after 2 days. P alone completed the remaining work. The work was finished in _______ days.
- A can do a piece of work in 10 days; B in 15 days. They work for 5 days. The rest of the work was finished by C in 2 days. If they get Rs. 1500 for the whole work, the daily wages of B and C are:
- If 120 men build a building in 30 days, how long will 80 men take?
- A and B can do a piece of work in 12 days, B can C in 8 days and C and A in 6 days. How long would B take to do the same work alone?
- A and B together can complete a work in 3 days. They start together but after 2 days, B left the work. If the work is completed after two more days, B alone could do the work in ____?
- 60 man can do a work in 40 days. How long will it take 40 men to complete the same work?
