Perimeter and Area — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A farmer has a field that is 15 m long and 8 m wide. How many square meters of seed does he need?
A) 46 square m
B) 92 square m
C) 120 square m
D) 100 square m
C is correct because area = 12 × 10 = 120 square m.
2. A garden is 9 m by 6 m. Fencing costs $2 per meter. What is the total cost?
A) $30
B) $54
C) $60
D) $36
C is correct because area = 4 × 5 = 20 sq ft, and 20 × $3 = $60.
3. A 5 cm square has a 3 cm square cut from the center. What area remains?
A) 22 square cm
B) 16 square cm
C) 10 square cm
D) 25 square cm
C is correct because area = 4 × 4 = 16 square cm.
4. A rectangular pool is 11 m by 7 m. How much rope is needed to go around it once?
A) 18 m
B) 77 m
C) 36 m
D) 30 m
C is correct because perimeter = 4 × 9 = 36 m.
Part B: Fill in the Blank
Write the correct answer on each line.
1. A wall is 6 feet tall and 4 feet wide. You need 24 square foot tiles to cover it.
Area = 6 × 4 = 24 square cm.
2. A park is 20 m long and 10 m wide. Its perimeter is 60 m.
Perimeter = 20 + 10 + 20 + 10 = 60 m.
3. A banner is 12 inches long and 3 inches wide. Its area is 36 square inches.
Area = 12 × 3 = 36 square cm.
4. A card is 7 cm long and 2 cm wide. Its perimeter is 18 cm.
Perimeter = 7 + 2 + 7 + 2 = 18 cm.
5. A rug is 11 m long and 6 m wide. Its area is 66 square m.
Area = 11 × 6 = 66 square cm.