Find the 15th term of the A.P. with second term 11 and common difference 9.

Find the sum of terms of the A.P. : 4, 9, 14, ……, 89.

Daya gets pocket money from his father every day. Out of the pocket money, he saves ₹ 2.75 on first day, ₹ 3.00 on second day, ₹ 3.25 on third day and so on. Find :

(i) the amount saved by Daya on 14^th day

(ii) the amount saved by Daya on 30^th day

(iii) the total amount saved by him in 30 days.