Five identical square tiles were pasted onto a rectangular wall shown .
- What is the area of the rectangular wall?
- What is the perimeter of the shaded part?
(a)
Length of each square tile
= 49 - 34
= 15
Length of the rectangle
= 20 + (4 x 15)
= 20 + 60
= 80
Area of the rectangular wall
= 80 x 49
= 3920 cm
2 (b)
Perimeter of the shaded part
= 49 + 49 + (80 - 15) + (80 - 15)
= 49 + 49 + 65 + 65
= 228 cm
Answer(s): (a) 3920 cm
2; (b) 228 cm