"10 persons begin to work together on a job but after some days 4 persons leave. As a result
Channel: Doubtnut
Date: 05/04/2020

"10 persons begin to work together on a job but
 after some days 4 persons leave. As a result the job which could have been
 completed in 40 days is completed in 50 days. How many days after the
 commencement of the work did the 4 persons leave?"