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 - 32
= 17
Length of the rectangle
= 22 + (4 x 17)
= 22 + 68
= 90
Area of the rectangular wall
= 90 x 49
= 4410 cm
2 (b)
Perimeter of the shaded part
= 49 + 49 + (90 - 17) + (90 - 17)
= 49 + 49 + 73 + 73
= 244 cm
Answer(s): (a) 4410 cm
2; (b) 244 cm