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
= 55 - 32
= 23
Length of the rectangle
= 22 + (4 x 23)
= 22 + 92
= 114
Area of the rectangular wall
= 114 x 55
= 6270 cm
2 (b)
Perimeter of the shaded part
= 55 + 55 + (114 - 23) + (114 - 23)
= 55 + 55 + 91 + 91
= 292 cm
Answer(s): (a) 6270 cm
2; (b) 292 cm