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 - 35
= 20
Length of the rectangle
= 24 + (4 x 20)
= 24 + 80
= 104
Area of the rectangular wall
= 104 x 55
= 5720 cm
2 (b)
Perimeter of the shaded part
= 55 + 55 + (104 - 20) + (104 - 20)
= 55 + 55 + 84 + 84
= 278 cm
Answer(s): (a) 5720 cm
2; (b) 278 cm