Mathematics · Speed, Distance and Time
If a copper wire is wrapped around the Earth 10 times, approximately how many seconds would it take for an electrical signal (traveling near the speed of light, c ≈ 3 × 108 m/s) to travel from one end to the other? (Assume Earth's circumference ≈ 40,000 km)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11.5 sec
- 21.3 sec✓
- 32.5 sec
- 40.5 sec
Correct answer
1.3 sec
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