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
= 47 - 36
= 11
Length of the rectangle
= 28 + (4 x 11)
= 28 + 44
= 72
Area of the rectangular wall
= 72 x 47
= 3384 cm
2 (b)
Perimeter of the shaded part
= 47 + 47 + (72 - 11) + (72 - 11)
= 47 + 47 + 61 + 61
= 216 cm
Answer(s): (a) 3384 cm
2; (b) 216 cm