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 - 40
= 15
Length of the rectangle
= 27 + (4 x 15)
= 27 + 60
= 87
Area of the rectangular wall
= 87 x 55
= 4785 cm
2 (b)
Perimeter of the shaded part
= 55 + 55 + (87 - 15) + (87 - 15)
= 55 + 55 + 72 + 72
= 254 cm
Answer(s): (a) 4785 cm
2; (b) 254 cm