In expressing a length of 77.470 km as nearly as possible with the three significant digits, find the percentage error Choose the correct choice from the following:
A) 0.39%  B) 0.34%  C) 0.039%  D) 0.035%  E) None of these
Explanation:   Error = (77.5 - 77.470)= 
<gadget id="calculator">(77.5 - 77.470)</gadget>
<output>0.03</output>
0.03   Required percentage=   0.03/ 77.470Ã—100=0.039   Option 0.039%
<result>C</result>
In expressing a length of 77.470 km as nearly as possible with the three significant digits, find the percentage error