Question

15 boys can finish a job in 8 days. How many days will 6 boys take to finish the same job.
​

Answer 1

Solution :-

Given : 15 boys can finish a job in 8 days.

Find the time taken by 6 boys to finish the same job :

By unitary method,

15 boys = 8 days

1 boy = 8 × 15 = 120 days

6 boys = 120/6 = 20 days

Hence,

6 boys can finish the job in 20 days.

Answer 2

Answer:

Step-by-step explanation:

Let the boys be x and days be y

15x = 8y

X = 120y

6x = 120y

X = 20 y

therefore 6 boys can do the work in 20 days