Question
Download Solution PDFA gear 15 cm in diameter is turning a gear 21 cm in diameter. When the smaller gear has 105 revolutions, how many has the larger one made?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
A gear 15 cm in diameter is turning a gear 21 cm in diameter.
When the smaller gear has 105 revolutions, how many has the larger one made?
Formula used:
The number of revolutions is inversely proportional to the diameter of the gears.
Calculation:
Let the number of revolutions of the larger gear be x.
⇒ 15 × 105 = 21 × x
⇒ x = (15 × 105) / 21
⇒ x = 75
∴ The correct answer is option (2).
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