A wheel has a radius of 21 cm. How many revolutions will it make to cover a distance of 1320 cm?
A5
B10
C15
D20
Explanation
Circumference = 2 * (22/7) * 21 = 132 cm. Revolutions = Total Distance / Circumference = 1320 / 132 = 10.
Exam Relevance
- Topic: Geometry & Mensuration
- Subtopic: Circles & Revolutions
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