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 - 36
= 18
Length of the rectangle
= 24 + (4 x 18)
= 24 + 72
= 96
Area of the rectangular wall
= 96 x 54
= 5184 cm
2 (b)
Perimeter of the shaded part
= 54 + 54 + (96 - 18) + (96 - 18)
= 54 + 54 + 78 + 78
= 264 cm
Answer(s): (a) 5184 cm
2; (b) 264 cm