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
= 49 - 39
= 10
Length of the rectangle
= 21 + (4 x 10)
= 21 + 40
= 61
Area of the rectangular wall
= 61 x 49
= 2989 cm
2 (b)
Perimeter of the shaded part
= 49 + 49 + (61 - 10) + (61 - 10)
= 49 + 49 + 51 + 51
= 200 cm
Answer(s): (a) 2989 cm
2; (b) 200 cm