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 - 40
= 11
Length of the rectangle
= 18 + (4 x 11)
= 18 + 44
= 62
Area of the rectangular wall
= 62 x 51
= 3162 cm
2 (b)
Perimeter of the shaded part
= 51 + 51 + (62 - 11) + (62 - 11)
= 51 + 51 + 51 + 51
= 204 cm
Answer(s): (a) 3162 cm
2; (b) 204 cm