Wpite QBASIC program to solve the following problems. Type them in the QBASIC IDE. Execute them and save them in D: drive. Write a program that asks length and breadth of a rectangle and calculates its area. Write a program to display your name and address side by side. (Q b a sic) Write a program to calculate and display the total price of 100 pens if a pen costs Rs 20. Write a program that asks radius of a circle then calculates and displays its area. Write a program that asks the principal amount, rate and time then calculates and displays simple interest. (GBAS.IC) Write a program that asks to input any two numbers and stores them in two different variables. Calculate and display their sum, difference and product. Write a program that asks to input the name of the item, price of item and number of item you want to buy then calculate the price you have to pay for them. Write a program that asks to input length, breadth and height of a box and calculates its volume and area. Write a program that asks to input a number then calculates square and square root of that number.

Certainly! Below are QBASIC programs for each of the problems you've listed. You can copy each program into the QBASIC IDE, execute them, and save them to your D: drive as needed. --- ### 1. Calculate the Area of a Rectangle **Program Description:** This program prompts the user to enter the length and breadth of a rectangle and then calculates and displays its area. ```basic CLS PRINT "Calculate the Area of a Rectangle" PRINT "-------------------------------" INPUT "Enter the length of the rectangle: ", LENGTH INPUT "Enter the breadth of the rectangle: ", BREADTH AREA = LENGTH * BREADTH PRINT "The area of the rectangle is: "; AREA END ``` **Instructions to Save:** 1. Copy the code into the QBASIC editor. 2. Save the file (e.g., `RectangleArea.BAS`) to the D: drive by selecting `File -> Save As` and navigating to the D: drive. --- ### 2. Display Name and Address Side by Side **Program Description:** This program displays your name and address side by side on the screen. ```basic CLS PRINT "Name"; TAB(20); "Address" PRINT "John Doe"; TAB(20); "123, Main Street" PRINT "Jane Smith"; TAB(20); "456, Oak Avenue" PRINT "Alice Johnson"; TAB(20); "789, Pine Road" END ``` **Explanation:** - The `TAB(20)` function positions the address 20 spaces to the right of the name, ensuring they appear side by side. --- ### 3. Calculate Total Price of 100 Pens **Program Description:** This program calculates and displays the total price of 100 pens, each costing Rs 20. ```basic CLS PRINT "Total Price Calculation for 100 Pens" PRINT "-------------------------------------" PRICE_PER_PEN = 20 NUMBER_OF_PENS = 100 TOTAL_PRICE = PRICE_PER_PEN * NUMBER_OF_PENS PRINT "Price per pen: Rs "; PRICE_PER_PEN PRINT "Number of pens: "; NUMBER_OF_PENS PRINT "Total price: Rs "; TOTAL_PRICE END ``` --- ### 4. Calculate the Area of a Circle **Program Description:** This program asks for the radius of a circle and calculates its area. ```basic CLS PRINT "Calculate the Area of a Circle" PRINT "-----------------------------" INPUT "Enter the radius of the circle: ", RADIUS ' Using 3.14159 as an approximation for PI AREA = 3.14159 * RADIUS * RADIUS PRINT "The area of the circle is: "; AREA END ``` --- ### 5. Calculate Simple Interest **Program Description:** This program calculates simple interest based on principal amount, rate, and time. ```basic CLS PRINT "Simple Interest Calculator" PRINT "--------------------------" INPUT "Enter the principal amount (Rs): ", PRINCIPAL INPUT "Enter the rate of interest (%): ", RATE INPUT "Enter the time period (years): ", TIME SIMPLE_INTEREST = (PRINCIPAL * RATE * TIME) / 100 PRINT "Principal Amount: Rs "; PRINCIPAL PRINT "Rate of Interest: "; RATE; "%" PRINT "Time Period: "; TIME; " years" PRINT "Simple Interest: Rs "; SIMPLE_INTEREST END ``` --- ### 6. Sum, Difference, and Product of Two Numbers **Program Description:** This program takes two numbers as input and calculates their sum, difference, and product. ```basic CLS PRINT "Sum, Difference, and Product of Two Numbers" PRINT "-------------------------------------------" INPUT "Enter the first number: ", NUM1 INPUT "Enter the second number: ", NUM2 SUM = NUM1 + NUM2 DIFFERENCE = NUM1 - NUM2 PRODUCT = NUM1 * NUM2 PRINT "Sum: "; SUM PRINT "Difference: "; DIFFERENCE PRINT "Product: "; PRODUCT END ``` --- ### 7. Calculate Total Price Based on Item Price and Quantity **Program Description:** This program calculates the total price based on the item's name, price, and quantity. ```basic CLS PRINT "Total Price Calculator" PRINT "-----------------------" DIM ITEM_NAME AS STRING DIM PRICE AS DOUBLE DIM QUANTITY AS INTEGER DIM TOTAL AS DOUBLE INPUT "Enter the name of the item: ", ITEM_NAME$ INPUT "Enter the price of the item (Rs): ", PRICE INPUT "Enter the number of items you want to buy: ", QUANTITY TOTAL = PRICE * QUANTITY PRINT "Item: "; ITEM_NAME$ PRINT "Price per item: Rs "; PRICE PRINT "Quantity: "; QUANTITY PRINT "Total price to pay: Rs "; TOTAL END ``` **Note:** In QBASIC, strings are typically denoted with a `$` at the end of the variable name (e.g., `ITEM_NAME$`). --- ### 8. Calculate Volume and Surface Area of a Box **Program Description:** This program calculates the volume and surface area of a box based on its length, breadth, and height. ```basic CLS PRINT "Volume and Surface Area of a Box" PRINT "----------------------------------" INPUT "Enter the length of the box: ", LENGTH INPUT "Enter the breadth of the box: ", BREADTH INPUT "Enter the height of the box: ", HEIGHT VOLUME = LENGTH * BREADTH * HEIGHT SURFACE_AREA = 2 * (LENGTH * BREADTH + BREADTH * HEIGHT + HEIGHT * LENGTH) PRINT "Volume of the box: "; VOLUME; " cubic units" PRINT "Surface Area of the box: "; SURFACE_AREA; " square units" END ``` --- ### 9. Calculate Square and Square Root of a Number **Program Description:** This program takes a number as input and calculates its square and square root. ```basic CLS PRINT "Square and Square Root Calculator" PRINT "---------------------------------" INPUT "Enter a number: ", NUMBER SQUARE = NUMBER ^ 2 ' QBASIC does not have a built-in square root function, so we use the exponentiation operator SQRT = NUMBER ^ 0.5 PRINT "Square of "; NUMBER; " is "; SQUARE PRINT "Square root of "; NUMBER; " is "; SQRT END ``` **Note:** In QBASIC, the `^` operator is used for exponentiation. Raising a number to `0.5` effectively calculates its square root. --- ### General Instructions to Save and Execute Programs 1. **Open QBASIC IDE:** - Launch the QBASIC IDE on your computer. 2. **Input the Program:** - Type or paste the desired program from above into the editor. 3. **Save the Program:** - Go to `File -> Save As`. - Navigate to the D: drive. - Enter a filename (e.g., `RectangleArea.BAS`). - Click `Save`. 4. **Run the Program:** - Press `F5` or go to `Program -> Start` to execute the program. 5. **Repeat for Each Program:** - Follow the same steps for each of the programs listed above, saving them with appropriate filenames. --- Feel free to modify and enhance these programs as per your requirements. If you encounter any issues or have further questions, feel free to ask!