Answer:
11 square centimeters of red paper will be visible on top.
Step-by-step explanation:
Width of the rectangular red sheet = w = 4 cm
Length of the rectangular red sheet = l = 2 × 4 cm = 8 cm
Area of the rectangle = l × w
Area of the rectangular red sheet = A
Width of the rectangular blue sheet = w' = 3 cm
Length of the rectangular blue sheet = l' = 7 cm
Area of the rectangular blue sheet = A'
After gluing blue paper on the top of red paper. The area of red paper that will be visible from the top is:
A - A' =