A worker is hired for 7 days. He is paid 25$ more for each day of work

A worker is hired for 7 days. He is paid 25$ more for each day of work than he was paid for the preceding day of work. What was the total amount that he was paid for his 7 days of work? (1) He had made 40% of the total by the end of the fourth day. (2) He was paid thrice as much for the last (…)