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
= 55 - 32
= 23
Length of the rectangle
= 21 + (4 x 23)
= 21 + 92
= 113
Area of the rectangular wall
= 113 x 55
= 6215 cm
2 (b)
Perimeter of the shaded part
= 55 + 55 + (113 - 23) + (113 - 23)
= 55 + 55 + 90 + 90
= 290 cm
Answer(s): (a) 6215 cm
2; (b) 290 cm