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 - 31
= 24
Length of the rectangle
= 27 + (4 x 24)
= 27 + 96
= 123
Area of the rectangular wall
= 123 x 55
= 6765 cm
2 (b)
Perimeter of the shaded part
= 55 + 55 + (123 - 24) + (123 - 24)
= 55 + 55 + 99 + 99
= 308 cm
Answer(s): (a) 6765 cm
2; (b) 308 cm