To convert the length of the truck from the grid measurement in centimeters to feet, you'll need to multiply the number of centimeters by the conversion factor you've provided, which is 1 cm = 1.7 feet.
If the actual length of the truck is given as \(20.4\) feet, we can work backwards to calculate the length in centimeters:
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Use the conversion factor inversely to find the length in centimeters:
\[ \text{Length in cm} = \frac{\text{Length in feet}}{1.7} \]
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Substituting the value:
\[ \text{Length in cm} = \frac{20.4 \text{ feet}}{1.7} \approx 12 \text{ cm} \]
Thus, if you measure 12 cm on the grid and convert it to feet using the conversion provided, the actual length of the truck is indeed approximately 20.4 feet. If you need further assistance or have more specifics about the truck's measurement, please let me know!