A job can be done by 4 men in 20 days. How many days will it take for 2 men to c

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Question: A job can be done by 4 men in 20 days. How many days will it take for 2 men to complete the same job?

Options:

Correct Answer: 40 days

Solution:

Total work = 4 men * 20 days = 80 man-days. 2 men will take 80/2 = 40 days.

A job can be done by 4 men in 20 days. How many days will it take for 2 men to complete the same job?

A job can be done by 4 men in 20 days. How many days will it take for 2 men to complete the same job?

Step 1: Understand that 4 men can complete the job in 20 days.
Step 2: Calculate the total work done in man-days. This is done by multiplying the number of men by the number of days: 4 men * 20 days = 80 man-days.
Step 3: Now, we need to find out how many days it will take for 2 men to complete the same job.
Step 4: To find this, divide the total work (80 man-days) by the number of men (2 men): 80 man-days / 2 men = 40 days.
Step 5: Therefore, it will take 2 men 40 days to complete the job.

Work Rate – Understanding how to calculate total work based on the number of workers and the time taken.
Man-Days – Using the concept of man-days to quantify work done by multiple workers over time.
Inverse Proportionality – Recognizing that as the number of workers decreases, the time taken to complete the job increases.