Questions

Assertion (A) & Reason (B) MCQ

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3 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Assertion (A) If $x$ varies directly as $y$ and $x=80$ when $y$ is 160 , then $y=128$, when $x=64$.
Reason (R) If $x$ varies directly as $y$, then $x y=k$, where $k$ is constant.
  • A
    Both A and R are true but R is the correct explanation of A
  • B
    Both A and R are true but R is not the correct explanation of A
  • A is true but R is false
  • D
    A is false but R is true
Answer
Correct option: C.
A is true but R is false
C
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MCQ 21 Mark
Assertion (A) If you increase the number of workers on a project, then the time it takes to complete the project decreases.
Reason (R) The number of workers and the time to complete a project are directly proportional.
  • A
    Both A and R are true but R is the correct explanation of A
  • B
    Both A and R are true but R is not the correct explanation of A
  • A is true but R is false
  • D
    A is false but R is true
Answer
Correct option: C.
A is true but R is false
C
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MCQ 31 Mark
Assertion (A) When the speed of a car doubles, the time it takes to travel a certain distance is halved.
Reason (R) Speed and time are inversely proportion to each other.
  • Both A and R are true but 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 but R is the correct explanation of A
A
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Assertion (A) & Reason (B) MCQ - MATHS STD 8 Questions - Vidyadip