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 - 34
= 21
Length of the rectangle
= 25 + (4 x 21)
= 25 + 84
= 109
Area of the rectangular wall
= 109 x 55
= 5995 cm
2 (b)
Perimeter of the shaded part
= 55 + 55 + (109 - 21) + (109 - 21)
= 55 + 55 + 88 + 88
= 286 cm
Answer(s): (a) 5995 cm
2; (b) 286 cm