Question

Determine the gear ratio for a bike with 45 front teeth and 18 rear sprocket teeth.

18/45 = 0.4

45/18 = 2.5

18(45) = 810

45 – 18 = 27

Answer 1

Answer: Second option is correct.

Explanation:

Since we have given that

Number of front teeth = 45

Number of rear sprocket teeth = 18

Ratio of front teeth to rear sprocket teeth would be

Number of front teeth : Number of rear sprocket teeth

`45:18\\\\=(45)/(18)\\\\=2.5`

Hence, Second option is correct.