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
= 51 - 34
= 17
Length of the rectangle
= 22 + (4 x 17)
= 22 + 68
= 90
Area of the rectangular wall
= 90 x 51
= 4590 cm
2 (b)
Perimeter of the shaded part
= 51 + 51 + (90 - 17) + (90 - 17)
= 51 + 51 + 73 + 73
= 248 cm
Answer(s): (a) 4590 cm
2; (b) 248 cm