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 - 33
= 16
Length of the rectangle
= 21 + (4 x 16)
= 21 + 64
= 85
Area of the rectangular wall
= 85 x 49
= 4165 cm
2 (b)
Perimeter of the shaded part
= 49 + 49 + (85 - 16) + (85 - 16)
= 49 + 49 + 69 + 69
= 236 cm
Answer(s): (a) 4165 cm
2; (b) 236 cm