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
= 53 - 41
= 12
Length of the rectangle
= 20 + (4 x 12)
= 20 + 48
= 68
Area of the rectangular wall
= 68 x 53
= 3604 cm
2 (b)
Perimeter of the shaded part
= 53 + 53 + (68 - 12) + (68 - 12)
= 53 + 53 + 56 + 56
= 218 cm
Answer(s): (a) 3604 cm
2; (b) 218 cm