HardDesign: Ride-Sharing Service (Uber/Lyft)

What geospatial precision (geohash length) should be used for finding drivers within 2km?

Tests your understanding of this concept.

Answer Options

ALength 4 (~40km x 20km)
BLength 6 (~1.2km x 0.6km)
CLength 8 (~40m x 20m)
DLength 3 (~160km x 80km)

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This question is from the Design: Ride-Sharing Service (Uber/Lyft) topic (System Design Cases).

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