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
= 45 - 34
= 11
Length of the rectangle
= 21 + (4 x 11)
= 21 + 44
= 65
Area of the rectangular wall
= 65 x 45
= 2925 cm
2 (b)
Perimeter of the shaded part
= 45 + 45 + (65 - 11) + (65 - 11)
= 45 + 45 + 54 + 54
= 198 cm
Answer(s): (a) 2925 cm
2; (b) 198 cm