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 - 33
= 18
Length of the rectangle
= 22 + (4 x 18)
= 22 + 72
= 94
Area of the rectangular wall
= 94 x 51
= 4794 cm
2 (b)
Perimeter of the shaded part
= 51 + 51 + (94 - 18) + (94 - 18)
= 51 + 51 + 76 + 76
= 254 cm
Answer(s): (a) 4794 cm
2; (b) 254 cm