# Speedometer

The speedometer of a car reads 66 km/h. It's accurate to within 4.1%

What is the maximum possible error?

Result

x =  1.353 km/h

#### Solution:

$x = \dfrac{ 4.1 }{ 100 } \cdot 66 /2 = \dfrac{ 4.1 \cdot 66 }{ 200 } \ \\ x = 1.353 \ \text{km/h}$

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