In an ap of 50 terms the sum of 10 terms is 210 and the sum of its last 15 terms is 2565.find the ap

In an ap of 50 terms the sum of 10 terms is 210 and the sum of its las

1.	In an ap of 50 terms the sum of 10 terms is 210 and the sum of its last 15 terms is 2565.find the ap
Answer» 3,7,11,15........