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## Homework Statement

http://education.alberta.ca/media/9451970/07_math30-1_released_2014-15.pdf

question #7

## Homework Equations

a=theta*r

## The Attempt at a Solution

I did a=(5pi/6)*20 but the answer is not A

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- Thread starter A123
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- #1

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http://education.alberta.ca/media/9451970/07_math30-1_released_2014-15.pdf

question #7

a=theta*r

I did a=(5pi/6)*20 but the answer is not A

- #2

SteamKing

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Science Advisor

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I think 'total perimeter' here means you go entirely around the area which is swept out by the wiper.## Homework Statement

http://education.alberta.ca/media/9451970/07_math30-1_released_2014-15.pdf

question #7

## Homework Equations

a=theta*r

## The Attempt at a Solution

I did a=(5pi/6)*20 but the answer is not A

- #3

Mark44

Mentor

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I agree with SteamKing's appraisal.I think 'total perimeter' here means you go entirely around the area which is swept out by the wiper.

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I think 'total perimeter' here means you go entirely around the area which is swept out by the wiper.

Yeah I just went back to it and I missed that word completely lol.

Its [(5pi/6)*20] + 16(2) + [(5pi/6)*4]

I was too focused on whats inside

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