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
= 52 - 43
= 9
Length of the rectangle
= 25 + (4 x 9)
= 25 + 36
= 61
Area of the rectangular wall
= 61 x 52
= 3172 cm
2 (b)
Perimeter of the shaded part
= 52 + 52 + (61 - 9) + (61 - 9)
= 52 + 52 + 52 + 52
= 208 cm
Answer(s): (a) 3172 cm
2; (b) 208 cm