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 - 43
= 6
Length of the rectangle
= 27 + (4 x 6)
= 27 + 24
= 51
Area of the rectangular wall
= 51 x 49
= 2499 cm
2 (b)
Perimeter of the shaded part
= 49 + 49 + (51 - 6) + (51 - 6)
= 49 + 49 + 45 + 45
= 188 cm
Answer(s): (a) 2499 cm
2; (b) 188 cm