Question 1: Calculate the area of a rectangular baking tray that measures 40 cm in length and 30 cm in width.

Answer: 1200

Question 2: A rectangular cake has a length of 50 cm and a width of 20 cm. Find the area of the cake.

Answer: 1000

Question 3: Construct a triangle with a base of 10 cm and a height of 8 cm on the grid. Calculate its area.

Answer: 40

Question 4: A kitchen counter is shaped like a rectangle measuring 2 m by 1.5 m. How much surface area does it cover?

Answer: 3

Question 5: A recipe requires a rectangular baking sheet that is divided into two parts: a main rectangle 40 cm by 30 cm, and a smaller rectangle 10 cm by 20 cm. Find the total area of the sheet by breaking it into parts.

Answer: 1400

Question 6: A rectangular pizza is 60 cm in diameter. If you cut out a triangular slice with a base of 15 cm and height of 12 cm, what is the area of the remaining pizza? (Use π≈3.14 for calculations.)

Answer: 2337

Question 7: Break down a composite shape: a L-shaped cooking tray made of a 40 cm by 30 cm rectangle and a 20 cm by 10 cm rectangle attached to it. Find the total area.

Answer: 1600

Question 8: A rectangular casserole has a length of 60 cm, width of 25 cm, and height of 15 cm. How much surface area needs to be covered for painting the outside?

Answer: 3900

Question 9: A rectangular platter is divided into three parts: two squares of 10 cm side and a rectangle of 20 cm by 15 cm. Break down the area calculation for the entire platter.

Answer: 650

Question 10: A cake is cut into a rectangular base (40 cm by 20 cm) and a triangular top (base 40 cm, height 15 cm). Find the total area of the top surface by breaking it down into shapes.

Answer: 600

Question 11: Identify and correct the mistake: A student calculates the area of a composite shape by adding a 30 cm by 20 cm rectangle and a triangle with base 30 cm and height 10 cm, obtaining 800 cm². What's wrong?

Answer: Triangle area should be (1/2)×30×10=150, total=30×20+150=750