M3.1

Bridge the Gap — Measure the Span

Set each plank's length so the whole bridge, once every plank is converted to centimetres and added, reaches exactly across the river.

🎯 Predict, then press Test the span: the converted total must equal the target in centimetres.

Plank A length 0 cm

Plank B length 0 m

Plank C length 0 mm

Each plank is measured in its own unit (shown on its slider). To find the real bridge length you must convert every plank to centimetres and add them up. 100 cm = 1 m and 10 mm = 1 cm. Guess the lengths, then press Test the span to see your bridge reach for the far cliff.

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