Question

if 30 men do 1/7part of a job in 2 days,how many days will 21 men take to do the job​

Answer 1

Answer:

30 men do 1/7 part of the work in 2days

1 men do 1/7partof work in 30×2 days

21 men do 1/7 part of work in (30×2)/21 days

So

1/7 part of work done by 21 men in (30×2)/21days

1part of work done by 21 men in {(30×2)/21}×2=20 days

SO 21 MEN COMPLETE FULL WORK IN 20 DAYS AND THE 1/7 th PART OF THE TOTAL WORK IN {(30×2)/21} DAYS