Is this a typo? Analog to digital sensor

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SUMMARY

The forum discussion centers on a potential typo in a homework problem related to analog to digital sensors. The user calculated values of 40 cm and 200 for two questions but found the provided solutions to be 40 cm and 20 cm. The user suspects that the second question may have been altered from a similar format to the first, leading to an outdated answer. The absence of units in the answer further complicates the verification of the solution.

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orangeincup
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Homework Statement


See picture.

The Attempt at a Solution


So, based on the two questions I looked at the graph and calculated the corresponding values
a) 40 cm
b) 200

I checked the solutions which say:
a) 40 cm
b) 20 cm

Is their answer for b) a typo, or am I reading it incorrectly?
 

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I think your answer is right.

My guess is that initially the second question was similar to the first ie given readout lookup distance and was rewritten to do the reverse lookup of given distance lookup readout and the answer was never updated. If they had left the units of measure in the answer we would have known for sure.
 

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