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As deduced from a survey, the classification of skilled workers is shown in the pie diagram. If the number of workers in the production sector is `4500`, answer the following questions.
`i.` What is the total number of skilled workers in all fields?
`ii`. What is the number of skilled workers in the field of constructions ?
`iii`. How many skilled workers are in agriculture?
`iv`. Find the difference between the number of workers in the field of production and construction.

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The correct Answer is:
`i. 18000` `ii3600` `iii1200` `iv 900`
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