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
= 49 - 31
= 18
Length of the rectangle
= 20 + (4 x 18)
= 20 + 72
= 92
Area of the rectangular wall
= 92 x 49
= 4508 cm
2 (b)
Perimeter of the shaded part
= 49 + 49 + (92 - 18) + (92 - 18)
= 49 + 49 + 74 + 74
= 246 cm
Answer(s): (a) 4508 cm
2; (b) 246 cm