 Hi and welcome to the session. I am Asha and I am going to help you with the following question which says a man starts repaying a loan as per installment of Rs 100. If he increases the installment by Rs 5 every month, what amount he would pay in the 30th installment? Let us now begin with the solution. The man starts repaying a loan and the first installment is Rs 100 and he increases the installment by Rs 5 every month. Therefore the repayment of loan will form an AP. The repayment of loan will form an AP. Starting with Rs 100, in the next month he will pay Rs 105, Rs 110, Rs 115 and so on. We have to find the 30th installment. Now by this AP, we find that the first term of the AP is 100. The common difference and let A 30 be the 30th term. So its formula is A plus 30 minus 1 into D. This is equal to 100 plus 29 and D is 5. This is equal to 100 plus 145 which is equal to 245. Therefore the 30th term AP is 245 or we can say that the 30th installment is equal to Rs 245. This completes the session. Take care and have a good day.