BECE Basic Science 2022 Objective — Question 79
Question 79 of 120 from the Basic Education Certificate Examination (Junior WAEC) (BECE) Basic Science 2022 Objective paper, with the correct answer and a full explanation.
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What will be the speed of rotation of a 40-tooth gear when it is driven by an 80-tooth gear with a speed of 20 rpm?
- A. 20
- B. 40Correct
- C. 60
- D. 80
- E. 100
Explanation
N₁ × T₁ = N₂ × T₂, so N × 40 = 20 × 80, giving N = 40 rpm.
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