Wheel

What is the wheel diameter if on the 0.38 km track turns 128 times?

Result

D =  94.5 cm

Solution:

$128 \cdot \pi D = 0.38 \ km \ \\ D = \dfrac{ 0.38 \cdot 1000 \cdot 100 }{ \pi \cdot 128 } = 94.5 \ \text{cm}$

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