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
= 47 - 31
= 16
Length of the rectangle
= 23 + (4 x 16)
= 23 + 64
= 87
Area of the rectangular wall
= 87 x 47
= 4089 cm
2 (b)
Perimeter of the shaded part
= 47 + 47 + (87 - 16) + (87 - 16)
= 47 + 47 + 71 + 71
= 236 cm
Answer(s): (a) 4089 cm
2; (b) 236 cm