Sara builds a birdhouse that is 1 foot wide, 2 feet tall and 2 feet deep. Jake builds a birdhouse that is 16 inches wide, 20 inches tall and 18 inches deep. What is the difference in volume between the two birdhouses?
To compare volumes, the measurements must be in the same units. There are 12 inches in 1 ft, so Sara’s birdhouse is 1 ft x 12 inches/ft = 12 inches wide, 2 ft x 12 inches/ft = 24 inches tall, and 2 ft x 12 inches/ft = 24 inches deep.
The volume of Sara’s birdhouse is 12 inches x 24 inches x 24 inches = <<12*24*24=6912>>6,912 cubic inches
The volume of Jake’s birdhouse is 16 inches x 20 inches x 18 inches = <<16*20*18=5760>>5,760 cubic inches.
The difference between the two birdhouses is 6,912 cubic inches – 5,760 cubic inches = <<6912-5760=1152>>1,152 cubic inches.
#### 1,152