Answer: n=4
Step-by-step explanation:
Given
dimension of the entire ground is [tex]28\times 90\ yards^2[/tex]
dimension of the porch is
[tex]l=90-2\times 14=62\ yards\\w=10\ yards[/tex]
[tex]\therefore 62\times 10\ yard^2[/tex]
Area of the entire field is
[tex]\Rightarrow A_1=90\times 28=2520\ yard^2[/tex]
Area of Porch
[tex]\Rightarrow A_2=62\times 10=620\ yard^2[/tex]
Now , the area of lawn is
[tex]\Rightarrow A_l=A_1-A_2\\\Rightarrow A_l=2520-620=1900\ yard^2[/tex]
No of bags(n) required is
[tex]\Rightarrow n=\dfrac{1900}{600}=3.167\\\text{i.e. n=4}[/tex]
