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
= 45 - 38
= 7
Length of the rectangle
= 23 + (4 x 7)
= 23 + 28
= 51
Area of the rectangular wall
= 51 x 45
= 2295 cm
2 (b)
Perimeter of the shaded part
= 45 + 45 + (51 - 7) + (51 - 7)
= 45 + 45 + 44 + 44
= 178 cm
Answer(s): (a) 2295 cm
2; (b) 178 cm