Total amount of cheques deposited:
The total amount of cheques deposited into the bank during the month is Rs. 18,600.

Entry in Pass Book:
One cheque for Rs. 2790 has been entered in the Pass Book on 2nd April 2019.

Explanation:
To explain the situation in detail, let's break it down into key points:

1. Total amount of cheques deposited:
- The total amount of cheques deposited into the bank during the month is Rs. 18,600.
- This means that individuals or organizations have written cheques for a sum of Rs. 18,600 and deposited them in the bank.
- These cheques could be from various sources such as salary, business transactions, or other forms of payments.

2. Entry in Pass Book:
- The Pass Book is a record maintained by the bank to keep track of the transactions made by an account holder.
- In this case, one cheque for Rs. 2790 has been entered in the Pass Book on 2nd April 2019.
- This entry represents the amount that has been credited to the account holder's bank account.

3. Significance of the Pass Book entry:
- The Pass Book entry of Rs. 2790 indicates that the bank has processed and accepted the cheque for that amount.
- It also signifies that the account holder's balance has increased by Rs. 2790 as a result of the cheque deposit.
- The entry in the Pass Book serves as a confirmation that the bank has acknowledged the deposit and the funds are available in the account.

4. Importance of maintaining Pass Book:
- The Pass Book is an essential document for account holders as it provides a record of their banking transactions.
- It helps in keeping track of deposits, withdrawals, and other financial activities.
- Account holders should regularly update and reconcile their Pass Book entries with their own records to ensure accuracy and identify any discrepancies.

In conclusion, the total amount of cheques deposited into the bank during the month is Rs. 18,600. One of these cheques, worth Rs. 2790, has been entered in the Pass Book on 2nd April 2019. Maintaining and reconciling the Pass Book is important to keep track of banking transactions and ensure accuracy in account balances.