PSLE A plot of land which had an area of 2556 m
2 was divided into three portions of equal width. These portions were fenced using 305 m of fence as shown.
- Find the length of HJ.
- Find the perimeter of the plot of land.
(a)
Length of the width of each portion
= 54 ÷ 3
= 18 m
Length of HJ
= (305 - 54 - 54 - 50 - 50) ÷ 2
= 97 ÷ 2
= 48.5 m
(b)
Area of the biggest portion
= 50 x 18
= 900 m
2
Area of the middle portion
= 48.5 x 18
= 873 m
2 Area of the smallest portion
= 2556 - 900 - 873
= 783 m
2 Length of the smallest portion
= 783 ÷ 18
= 43.5 m
Perimeter of the plot of land
= 305 - (2 x 43.5)
= 305 - 87
= 218 m
Answer(s): (a) 48.5 m
2; (b) 218 m