Page 2 - LN 7

= Area of rectangle ABCD + Area of the rectangle CEFG

Area of rectangle ABCD:

length AB = 15 ft and width BD = 9 ft

= length x width

= 15 x 9

= 135 ft² ----(1)

Area of rectangle CEFG:

length CE = 24 ft and width CF = AF - AC ==> 18 - 9 = 9 ft

= length x width

= 24 x 9

= 216 ft² ----(1)

(1) + (2)

Area of the rose garden = 135 + 216 ==> 351 ft²

Number of bags that she needed = 351/12 ==> 29.25

So, she will need 30 bags of mulch

Example: The width of a rectangle is 4 less its length. If its length is 11 cm, then find
the perimeter.

Solution: Length (l) = 11

Width = 11 – 4 = 7cm

So, the perimeter of the rectangle is

= 2(l + w)

= 2(11 + 7)

= 2(18)

= 36 cm