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
= 48 - 36
= 12
Length of the rectangle
= 24 + (4 x 12)
= 24 + 48
= 72
Area of the rectangular wall
= 72 x 48
= 3456 cm
2 (b)
Perimeter of the shaded part
= 48 + 48 + (72 - 12) + (72 - 12)
= 48 + 48 + 60 + 60
= 216 cm
Answer(s): (a) 3456 cm
2; (b) 216 cm