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 `30`th installment? What amount of loan does he still have to pay after the `30`th installment?

Explanation

To solve the problem step by step, we will break it down into two parts: finding the amount paid in the 30th installment and calculating the remaining loan after the 30th installment.

### Step 1: Determine the 30th Installment

1. **Identify the first installment and common difference:**
- First installment (A) = Rs. 1000
- Common difference (D) = Rs. 100

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