"Trailing zeros in a number without a decimal point are not significant." Show that this statement is not always true.

(N/A) The rule that trailing zeros are not significant applies to numbers without a decimal point. However,when a measurement is made with a specific instrument,the trailing zeros indicate the precision of the measurement.
Consider a cylinder measured with a Vernier caliper having a least count of $0.01 \ cm$. If the measured length is exactly $3.50 \ cm$,the trailing zero is significant because it indicates that the measurement was taken with an instrument capable of measuring up to the second decimal place.
Thus,the trailing zero in $3.50 \ cm$ is a significant figure,demonstrating that the general rule is not always applicable in the context of physical measurements.