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
= 50 - 32
= 18
Length of the rectangle
= 19 + (4 x 18)
= 19 + 72
= 91
Area of the rectangular wall
= 91 x 50
= 4550 cm
2 (b)
Perimeter of the shaded part
= 50 + 50 + (91 - 18) + (91 - 18)
= 50 + 50 + 73 + 73
= 246 cm
Answer(s): (a) 4550 cm
2; (b) 246 cm