If no of men used initially is x, then after (35-x) days 5 men can leave so that the job can be completed in 35 days.
a contract was signed to complete a job in 30 days. after how many days can 5 men leave then so that the job can be completed in 35 days
[a] 30 days.
[b] 35 days.
[c] 45 days.
[d] 55 days.
[e] 65 days.