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
= 54 - 40
= 14
Length of the rectangle
= 25 + (4 x 14)
= 25 + 56
= 81
Area of the rectangular wall
= 81 x 54
= 4374 cm
2 (b)
Perimeter of the shaded part
= 54 + 54 + (81 - 14) + (81 - 14)
= 54 + 54 + 67 + 67
= 242 cm
Answer(s): (a) 4374 cm
2; (b) 242 cm