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 - 38
= 13
Length of the rectangle
= 19 + (4 x 13)
= 19 + 52
= 71
Area of the rectangular wall
= 71 x 51
= 3621 cm
2 (b)
Perimeter of the shaded part
= 51 + 51 + (71 - 13) + (71 - 13)
= 51 + 51 + 58 + 58
= 218 cm
Answer(s): (a) 3621 cm
2; (b) 218 cm