Assertion (A) & Reason (B) MCQ

MCQ 11 Mark

Assertion (A): Area of rectangle of length 5 cm and breadth 4 cm is 20 cm2.
Reason (R): Area is the amount of surface enclosed by a figure.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.

Answer

Option (a) is correct.
Explanation:
As, Area is the amount of surface enclosed by a figure and Area of rectangle = l × b = 5 × 4 = 20 cm²
Thus, R is the correct explanation of A.

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MCQ 21 Mark

Assertion (A): Perimeter of an equilateral triangle = 2 length of side
Reason (R): Perimeter is the length of the boundary of a shape.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true. (Medium)

Answer

Option (d) is correct.
Explanation:
Perimeter is the distance or length of the boundary of a figure and perimeter of equilateral triangle is 3 × length of side.

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MCQ 31 Mark

Assertion: The perimeter of a regular pentagon of side 2 units is 10 units.
Reason: The Perimeter is the distance covered around the boundary forming a closed figure when you go around the figure once.
In the given question, a statement of Assertion is followed by a statement of Reason. Choose the correct option as:

A
Both assertion and reason are true and the reason is the correct explanation of the assertion.
B
Both assertion and reason are true but the reason is not the correct explanation of the assertion.
C
Assertion is true and the reason is false.
D
Assertion is false and the reason is true.

Answer

A. Both assertion and reason are true and the reason is the correct explanation of the assertion.

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MATHS Assertion (A) & Reason (B) MCQ

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