Perimeter and length of an arc MCQs
Practice Perimeter and length of an arc multiple-choice questions from Areas Related to Circles (Class 10 Maths) - tap an answer for instant feedback and a step-by-step solution. Practice the full set free on the RankByte app.
Perimeter and length of an arcQuiz - Solve & Score
Q1. How many revolutions does a wheel of radius 14 cm make to cover 1760 cm (pi = 22/7)?
- A.21
- B.125
- C.20
- D.88
Answer: C. 20
Q2. How many revolutions does a wheel of radius 14 cm make to cover 4400 cm (pi = 22/7)?
- A.50
- B.51
- C.314
- D.88
Answer: A. 50
Q3. How many revolutions does a wheel of radius 21 cm make to cover 2640 cm (pi = 22/7)?
- A.132
- B.20
- C.21
- D.125
Answer: B. 20
Quick parse - a typical math numerical. The data on the table: 21 cm, 2640 cm. We are after How many revolutions does a wheel of radius 21 cm make to cover 2640 cm (pi = 22/7)?. Tool of choice - hence the answer = 20. Rearrange it for the unknown before substituting. Numbers in: hence the answer = 20. Common-sense check: draw the relevant radii and use the fact that the tangent _|_ radius at the contact point. Lock in option B) 20. Trap-watch: option A) '132' doesn't hold - Wrong: uses an incorrect intermediate value; option C) '21' is wrong because Wrong: a step was skipped or HCF/LCM swapped.
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