Kavya buys snacks from the school canteen. The cost of a samosa is \(Rs.19.5\) and a milkshake costs \(Rs. 15.25\). She gives the shopkeeper \(Rs. 40\).
Based on the given information solve the following questions
1. What is the total amount Riya has to pay?
2. How much money will Riya get back from the shopkeeper?
3. which place value does the digit \(9\) represent in the number \(19.5\)?
4. If Kavya had given \(Rs.30.5\) instead of \(Rs.40\), how much more money would she need to pay?