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24 June, 03:20

He

12. A propeller rotates 6 times every 15

seconds. Based on this information, which of

the following could NOT be true?

A. The propeller rotates 30 times in 90

seconds.

B. The propeller rotates 24 times in one

minute.

C. The propeller rotates 18 times in 45

seconds.

D. The propeller rotates 12 times in 30

seconds.

+3
Answers (2)
  1. 24 June, 03:42
    0
    A. The propeller rotates 30 times in 90 seconds

    Step-by-step explanation:

    Is not true as the propeller would rotate 36 times.
  2. 24 June, 03:45
    0
    the answer is A, 15*6 = 90 so 6*6=36 which is not 30
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