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Class 10MathematicsQuadratic EquationsWord Problems and ApplicationsEasyLevel 41
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A square courtyard has area (400) square m. What is its perimeter?

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Answer and explanation

Correct answer: (80) m

(x^2=400) gives side (20) m and perimeter (4x=80) m. Area and perimeter formulas are different.

Related tags

Quadratic EquationsSquarePerimeter

Frequently asked questions

What is the correct answer to this question?

(80) m

Why is this the correct answer?

(x^2=400) gives side (20) m and perimeter (4x=80) m. Area and perimeter formulas are different.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Quadratic Equations. Topic: Word Problems and Applications.

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  2. 2The product of two consecutive positive integers is (72). What is the smaller integer?
  3. 3The product of two consecutive positive integers is (132). What is the larger integer?
  4. 4A rectangle has length (3) cm more than its breadth and area (70) square cm. What is the breadth?
  5. 5A rectangle has breadth (6) m and area (96) square m. If its length is (x) m, which equation is correct?
  6. 6A square garden has area (169) square m. What is its side?
  7. 7A square field has area (225) square m. What is its perimeter?
  8. 8A number multiplied by its next integer gives (56). What is the number?
  9. 9The square of a positive number is (24) more than (5) times the number. What is the number?
  10. 10The square of a positive number is (45) more than (4) times the number. What is the number?
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