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1.
When heated an iron bar expands 0.2% . If the increased length is 1cm , what is the original length of the bar ?
- A. 500cm
- B. 500cm
- C. 500cm
- D. 500cm
Answer: Option A
Explanation:
0.2% = 1cm
1% = 1/0.2%cm
100% = ( 1 * 100% ) /0.2% cm = 500cm
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