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A rope makes 125 rounds of a cylinder with base radius 15 cm. How many times can it go round a cylinder with base radius 25 cm?
- A100
- B75
- C80
- D65
Answer not set
Discussion 1
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Solution
Let the required number of rounds be x.
More radius, less rounds (Inverse Proportion)
Radius in cm == Round
15 == 125
25 == x
⟹ x=(15 * 125)/25 = 75 rounds
Let the required number of rounds be x.
More radius, less rounds (Inverse Proportion)
Radius in cm == Round
15 == 125
25 == x
⟹ x=(15 * 125)/25 = 75 rounds