
If the circumference of a circle and the perimeter of a square are equal, then which of the following statements is correct?
Area of circle = Area of square
Area of the circle > Area of the square
Area of circle < Area of the square
Nothing definite can be said about the relation between the areas of the circle and the square.
Answer
533.4k+ views
2 likes
Hint: Use the direct formula for circumference of the circle which is where r is the radius of the circle and perimeter of the square which is 4a if a is the side of the square to obtain the relation between the side of square a and the radius of circle r.
Complete step-by-step answer:
As we know that the circumference of a circle is calculated as where r is the radius of the circle.
Now let the side of the square be a unit.
As we know that square has four sides and all have equal lengths.
Now we know that the perimeter of any shape is the sum of all side lengths.
So the perimeter of square = (a + a + a +a) = 4a
Now it is given that the circumference of the circle is equal to the perimeter of the square.
...................................... (1)
Now as we know that the area (AC) of the circle is and the area (AS) of the square is side square (i.e. ).
and
Now from equation (1) the value of r in terms of a is
Now substitute this value of r in area of circle we have,
Now as we know that the value of so
Therefore,
So the area of the circle is greater than the area of the square.
Hence option (B) is correct.
Note: It is always advised to cross check each and every option while solving such types of questions. Some of the basic formulas of area of circle and area of the square need to be remembered. Perimeters in case of many figures can directly be termed as the sum of all sides. Circumference refers to the outer length of the circle. Area is usually determined in case of 2-d figures.
Complete step-by-step answer:
As we know that the circumference of a circle is calculated as
Now let the side of the square be a unit.
As we know that square has four sides and all have equal lengths.
Now we know that the perimeter of any shape is the sum of all side lengths.
So the perimeter of square = (a + a + a +a) = 4a
Now it is given that the circumference of the circle is equal to the perimeter of the square.
Now as we know that the area (AC) of the circle is
Now from equation (1) the value of r in terms of a is
Now substitute this value of r in area of circle we have,
Now as we know that the value of
Therefore,
So the area of the circle is greater than the area of the square.
Hence option (B) is correct.
Note: It is always advised to cross check each and every option while solving such types of questions. Some of the basic formulas of area of circle and area of the square need to be remembered. Perimeters in case of many figures can directly be termed as the sum of all sides. Circumference refers to the outer length of the circle. Area is usually determined in case of 2-d figures.
Latest Vedantu courses for you
Grade 10 | CBSE | SCHOOL | English
Vedantu 10 CBSE Pro Course - (2025-26)
School Full course for CBSE students
₹37,300 per year
Recently Updated Pages
Master Class 10 Computer Science: Engaging Questions & Answers for Success

Master Class 10 Maths: Engaging Questions & Answers for Success

Master Class 10 English: Engaging Questions & Answers for Success

Master Class 10 General Knowledge: Engaging Questions & Answers for Success

Master Class 10 Science: Engaging Questions & Answers for Success

Master Class 10 Social Science: Engaging Questions & Answers for Success

Trending doubts
What is Whales collective noun class 10 english CBSE

What is potential and actual resources

For what value of k is 3 a zero of the polynomial class 10 maths CBSE

What is the full form of POSCO class 10 social science CBSE

Which three causes led to the subsistence crisis in class 10 social science CBSE

Fill in the blank with the most appropriate preposition class 10 english CBSE
