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 - 33
= 14
Length of the rectangle
= 19 + (4 x 14)
= 19 + 56
= 75
Area of the rectangular wall
= 75 x 47
= 3525 cm
2 (b)
Perimeter of the shaded part
= 47 + 47 + (75 - 14) + (75 - 14)
= 47 + 47 + 61 + 61
= 216 cm
Answer(s): (a) 3525 cm
2; (b) 216 cm