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
= 51 - 42
= 9
Length of the rectangle
= 28 + (4 x 9)
= 28 + 36
= 64
Area of the rectangular wall
= 64 x 51
= 3264 cm
2 (b)
Perimeter of the shaded part
= 51 + 51 + (64 - 9) + (64 - 9)
= 51 + 51 + 55 + 55
= 212 cm
Answer(s): (a) 3264 cm
2; (b) 212 cm