Question 19
Lucy wants to make a porch roof for her doll house by cutting and gluing cardboard. Each tile of the roof is made by one square of perimeter 32 cm attached with one semi-circle as the figure below. Identical tiles are placed next to each other to make a roof with a length of 48 cm. Find the total area of the used cardboard. (Take π = 3.)
Editorial clarification: the row in the picture illustrates joining tiles; use the stated roof length to determine their number.
Editorial clarification: the row in the picture illustrates joining tiles; use the stated roof length to determine their number.