Question

12 people need 45 days to complete a work how many days is needed for 27 workers to do a work​

Answer 1

Answer:

20

Step-by-step explanation:

Let the total work be considered as unity.

So, in 45 days, 12 people do unity work

In 1 day, work done by 12 people = 1/45

In 1 day, work done by 1 person = 1/540

In 1 day, work done by 27 people = 27/540 = 1/20

So, to complete the work, 27 people will require 20 days.

A short trick used by me:-

When this type of problems are faced, remember that the product of no. of men and no. of days = constant.

Let the no. of days req. = x

So, 45 * 12 = 27 * x

So, x = 45*12/27 = 20.

This proved to be helpful for me.