To find the number of bags of sod, you need to find the area of the entire yard.
The area of the yard consists of two rectangles.
Use the formula A = lw to find the area of each rectangle.
A = 15 x 20
A = 300 ft.²
A = 50 x 30
A = 1500 ft.²
1500 + 300 = 1800 ft.²
Take the total area and break it into groups of 400 ft.².
1800/400= 4.5 bags
Buzz will need 5 full bags of sod.