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MATHS Assertion (A) & Reason (B) MCQ

Mensuration · Bihar Board (BSEB) STD 8 (BSEB - English Medium). 60 questions.

Questions · Page 2 of 2

Assertion (A) & Reason (B) MCQ

MCQ 511 Mark
Assertion (A): The area of a parallelogram of base b and altitude h is bh
Reasons (R): The formula to calculate the area of a parallelogram is given as Area of parallelogram = base × height square units.
  • ✓
    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
Correct option: A.
Both A and R are true and R is the correct explanation of A.
A
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MCQ 521 Mark
Assertion (A): The area of a circle of radius r is r × r
Reasons (R): Area of a circle is the region occupied by the circle in a two-dimensional plane. It can be determined easily using a formula, $\text{A} = \pi\text{r}^{2}$
  • ✓
    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
Correct option: A.
Both A and R are true and R is the correct explanation of A.
A
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MCQ 531 Mark
Assertion (A): If the height of a cuboid becomes zero, it will take the shape of a square
Reasons (R): a cuboid is a convex polyhedron bounded by six quadrilateral faces, whose polyhedral graph is the same as that of a cube.
  • 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
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 541 Mark
Assertion (A): A glass in the form of a right circular cylinder is half full of water. Its base radius is 3cm and height is 8cm. The volume of water is 36cm3
Reasons (R): Volume is calculated by multiplying length x width x height.
  • 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
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 551 Mark
Assertion (A): 8 persons can stay in a cubical room. Each person requires 27m3 of air. The side of the cube is 6cm.
Reasons (R): The surface area of a cube can be represented as 6s2, since a cube has six sides and the surface area of each side is represented by its length.
  • A
    Both A and R are true and R is the correct explanation of A.
  • ✓
    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
Correct option: B.
Both A and R are true but R is not the correct explanation of A.
B
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MCQ 561 Mark
Assertion (A): 1m3 = 1000000cm3
Reasons (R): Area is the quantity that expresses the extent of a two-dimensional region, shape, or planar lamina, in the plane.
  • ✓
    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
Correct option: A.
Both A and R are true and R is the correct explanation of A.
A
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MCQ 571 Mark
Assertion (A): 1mm3 = 0.001cm3
Reasons (R): Area is the quantity that expresses the extent of a two-dimensional region, shape, or planar lamina, in the plane.
  • ✓
    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
Correct option: A.
Both A and R are true and R is the correct explanation of A.
A
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MCQ 581 Mark
Assertion (A): 1cm3 = 100mm3
Reasons (R): Area is the quantity that expresses the extent of a two-dimensional region, shape, or planar lamina, in the plane.
  • 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
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 591 Mark
Assertion (A): 1cm3 = 0.01m3
Reasons (R): Area is the quantity that expresses the extent of a two-dimensional region, shape, or planar lamina, in the plane.
  • 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
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 601 Mark
Assertion (A): The volume of a cylinder of base radius r and height h is $\pi\text{r}^{2}{\text{h}}$
Reasons (R): The volume of cylinder is the amount of space in it. It can be obtained by multiplying its base area by its height.
  • ✓
    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
Correct option: A.
Both A and R are true and R is the correct explanation of A.
A
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