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TEACHER-GUIDE-VERIFIED · TG-V9-032

5. A 4 cm image represents 120 km. What distance does 7 cm represent?

Verified solution

Solution: 4/120=7/x; 4x=840; x=210 km.

Source: Teacher Guide V9 · English V9. Match the numbers and wording in your printed question before using this solution.

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VIDEO HELP · TG-V9-032

Convert Image Length to Real Distance (TG-V9-032)

A 4 cm image represents 120 km. Find the unit scale of 30 km per image centimeter, then calculate that 7 cm represents 210 km. Confirm with a proportion, reverse calculation and matching scale factors.

Space Math Explorers · approved worked example · 1:33 · Watch on YouTube

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These pages reproduce verified solution steps for the registered V9 questions. It does not diagnose learning needs or replace instruction from a qualified teacher or tutor.