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
= 18 + (4 x 9)
= 18 + 36
= 54
Area of the rectangular wall
= 54 x 51
= 2754 cm
2 (b)
Perimeter of the shaded part
= 51 + 51 + (54 - 9) + (54 - 9)
= 51 + 51 + 45 + 45
= 192 cm
Answer(s): (a) 2754 cm
2; (b) 192 cm