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The answer depends on which tapes! And since you have not bothered to share that crucial bit of information, I cannot provide a more useful answer.
2y+3y=$31 3x+2y=$29
The usual method for measuring distance is using tapes. To overcome the obstruction to horizontal distance measurement 30 m steel ribbon tapes can be used.
You can buy many tapes with inches on one edge and metric on the other.
18 and a half mintues erased from the watergate tapes