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 - 34
= 20
Length of the rectangle
= 23 + (4 x 20)
= 23 + 80
= 103
Area of the rectangular wall
= 103 x 54
= 5562 cm
2 (b)
Perimeter of the shaded part
= 54 + 54 + (103 - 20) + (103 - 20)
= 54 + 54 + 83 + 83
= 274 cm
Answer(s): (a) 5562 cm
2; (b) 274 cm