Solve for Unknowns in Perimeter Problems: Grade 7 Math

A rectangular garden has a length of 10 meters and a width of x meters. If the perimeter of the garden is 40 meters, what is the value of x?

• 5

• 15

• 20

• 10

A fence is to be built around a square playground. If the perimeter of the playground is 48 meters, what is the length of one side?

• 16 meters

• 12 meters

• 10 meters

• 14 meters

A rectangular swimming pool has a length of 15 meters and a width that is 5 meters less than the length. What is the perimeter of the pool?

• 50 meters

• 40 meters

• 60 meters

• 30 meters

The perimeter of a rectangular classroom is 60 meters. If the length is 5 meters more than the width, what are the dimensions of the classroom?

• Width: 8 meters, Length: 13 meters

• Width: 12 meters, Length: 17 meters

• Width: 14 meters, Length: 19 meters

• Width: 10 meters, Length: 15 meters

A rectangular field has a perimeter of 100 meters. If the length is twice the width, what are the dimensions of the field?

• Width: 20 meters, Length: 40 meters

• Width: 16.67 meters, Length: 33.33 meters

• Width: 25 meters, Length: 50 meters

• Width: 10 meters, Length: 20 meters

A picture frame is in the shape of a rectangle. If the length is 12 inches and the perimeter is 50 inches, what is the width of the frame?

• 15 inches

• 10 inches

• 20 inches

• 13 inches

A rectangular plot of land has a perimeter of 80 meters. If the width is 10 meters, what is the length of the plot?

• 25 meters

• 30 meters

• 35 meters

• 20 meters

A garden is in the shape of a rectangle with a perimeter of 72 meters. If the length is 3 times the width, what are the dimensions of the garden?

• Width: 6 meters, Length: 18 meters

• Width: 12 meters, Length: 36 meters

• Width: 15 meters, Length: 45 meters

• Width: 9 meters, Length: 27 meters

A rectangular room has a perimeter of 54 feet. If the length is 6 feet more than the width, what are the dimensions of the room?

• Width: 10 feet, Length: 16 feet

• Width: 9 feet, Length: 15 feet

• Width: 8 feet, Length: 14 feet

• Width: 12 feet, Length: 18 feet

A rectangular box has a perimeter of 64 inches. If the length is 4 inches less than twice the width, what is the width of the box?

• 16 inches

• 12 inches

• 10 inches

• 14 inches