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 - 30
= 25
Length of the rectangle
= 20 + (4 x 25)
= 20 + 100
= 120
Area of the rectangular wall
= 120 x 55
= 6600 cm
2 (b)
Perimeter of the shaded part
= 55 + 55 + (120 - 25) + (120 - 25)
= 55 + 55 + 95 + 95
= 300 cm
Answer(s): (a) 6600 cm
2; (b) 300 cm