Question

10 person can finish a piece of work in 15 days . in how many day the same work can be done by 25 persons.

Answer 1

10 person can finish a piece of work in 15 days .

So 25 persons will complete in 25 x 15 / 10

                                      = 75 / 2

           or it will be 37 1/2 days

                                                   

                                                       

Answer 2

Answer:

The number of days required by 25 persons to complete the same piece of work = 6 days

Step-by-step explanation:

Given that 10 persons can finish a piece or work in 15 days

⇒ 10 person's work per day = 1/15

⇒ 1 person's work per day = 1/15×10 = 1/150

We need to find the number of days taken by 25 persons to complete the same piece of work

⇒ 25 person's work per day = 25/150

⇒ 25 person can finish the same piece of work in 150/25 = 6 days

Hence, The number of days required by 25 persons to complete the same piece of work = 6 days