Question:A Metre is taken to be equal to `39.3701` inches . If the value is approximated to `39 (7)/(20)` inches ,the relative percentage erro  is : 

A `5%` 
B `0.5%` 
C `.05%` 
D `0.005%` 

+ Answer
C 

+ Explanation
Exact value`= 39.3701` inches

Approximate value = `39 + 7/20`

                         `= 39 + 0.35`

                        `= 39.35`.

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Irin Moni

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