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 - 36
= 19
Length of the rectangle
= 20 + (4 x 19)
= 20 + 76
= 96
Area of the rectangular wall
= 96 x 55
= 5280 cm
2 (b)
Perimeter of the shaded part
= 55 + 55 + (96 - 19) + (96 - 19)
= 55 + 55 + 77 + 77
= 264 cm
Answer(s): (a) 5280 cm
2; (b) 264 cm