Jaspal Singh repays his total loan of Rs. 118000 by paying every month starting with the first installment of Rs. 1000. If he increases the installment by Rs. 100 every month, what amount will be paid by him in the 30th installment? What amount of loan does he still have to pay after the 30th installment?

Explanation

To solve the problem, we need to determine the amount Jaspal Singh will pay in the 30th installment and how much of the loan he still owes after that installment.

### Step 1: Identify the sequence of payments
Jaspal starts with an installment of Rs. 1000 and increases it by Rs. 100 every month. This forms an arithmetic progression (AP) where:
- First term (a) = 1000
- Common difference (d) = 100

### Step 2: Find the amount paid in the 30th installment
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