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# Taper question. watch

1. Hello,

Anyone able to help me on this one?

Thanks.
2. (Original post by Mohit_C)
Hello,

Anyone able to help me on this one?

Thanks.
work out the difference in diameter/radius in cm

every cm in length you lose 0.02 mm

can you see what to do?
3. I've been given the answer of 11 cm, but if I do:
24.97 cm - 24.75 cm = 0.22 cm
0.22 cm = 2.2 mm
Therefore 2.2 / 0.02 = 110 cm
4. (Original post by Mohit_C)
I've been given the answer of 11 cm, but if I do:
24.97 cm - 24.75 cm = 0.22 cm
0.22 cm = 2.2 mm
Therefore 2.2 / 0.02 = 110 cm
wrong

it said 0.02 mm taper per cm

so .22/0.02
5. I don't quite understand what "tapers by 0.02 mm per cm" means.
6. (Original post by Mohit_C)
I don't quite understand what "tapers by 0.02 mm per cm" means.
tapers means it goes in (it narrows)

every cm in length the radius goes 0.02 mm smaller

(use the quote button for quicker responses)
7. (Original post by TeeEm)
tapers means it goes in (it narrows)

every cm in length the radius goes 0.02 mm smaller

(use the quote button for quicker responses)
+++EDIT+++

I think I figured out where I went wrong.

If I were to convert 0.02 mm per cm to the same cm units:

0.02 x 10 / 10 = 0.2 cm per 10 cm

Therefore, 0.22 / 0.2 = 1.1 x 10 = 11 cm

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