An experiment measures quantities a, b and c, and X is calculated from X=ab2/c3. If the percentage error in a, b and c are ±1% , ±3% and ±2% respectively, the percentage error in X will be:
A
±13%
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B
±7%
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C
±4%
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D
±1%
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Solution
The correct option is A±13% x=ab2/c3 Thus, △xx=△aa+2△bb+3△cc