Answer:
Perimeter of room = 42 m
Step-by-step explanation:
Perimeter and Area:
[tex]\boxed{\bf Area \ of \ rectangle = length * width }[/tex]
Area of rectangle I:
length = 10 m
width = 5 m
Area of rectangle I = 10 * 5
= 50 m²
Area of rectangle II:
length = x m
width = 10 - 7 = 3 m
Area of rectangle II = 3*x
= 3x m²
Area of rectangle I + area of rectangle II = area of the room
50 + 3x = 68
3x = 68 - 50
3x = 18
x = 18 ÷ 3
x = 6
Width of rectangle II = 6 m
Perimeter of the room = 10 + 5 + 7 + 6 + 3 + 6 + 5
= 42 m
