Question

If 30 men can do a piece of work in 15 days,
in how many days will 25 men do it?​

Answer 1

Answer:

Step-by-step explanation:

18 days

Answer 2

Answer:

25 men will take 12$\frac{1}{2}$ days to to do the work.

Step-by-step explanation:

Unitary method:

• A single or distinct unit is referred to by the word unitary. Therefore, the goal of this strategy is to establish values in reference to a single unit.
• In other words, the unitary approach is the process by which we determine the value of a single unit and then utilize that information to determine the values of numerous units.

Finding no.of days:

Let no. of days = x

 Given,

    30 men can do a piece of  work in 15 days

    25 men can do the same work in y days.

By the unitary method, we can find the value of x.

           30 men → 15 days

            25 men → y days

       now cross multiply the values

                 30×y = 15×25  

                   30y = 375

                       y = 375/30

                       y = 12.5

                       y = 12$\frac{1}{2}$ days

      Hence, 25 men will take 12$\frac{1}{2}$ days to to do the work.

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