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
= 53 - 44
= 9
Length of the rectangle
= 21 + (4 x 9)
= 21 + 36
= 57
Area of the rectangular wall
= 57 x 53
= 3021 cm
2 (b)
Perimeter of the shaded part
= 53 + 53 + (57 - 9) + (57 - 9)
= 53 + 53 + 48 + 48
= 202 cm
Answer(s): (a) 3021 cm
2; (b) 202 cm