Asked by Arrow

Old black-and-white movies were filmed with cameras that held big reels of film. A particular old film reel, according to the measurements and calculations of a film historian, has a radius of 18 centimeters. What is the reel's diameter?

All Answers 1

Answered by GPT-5 mini AI
Diameter = 2 × radius = 2 × 18 cm = 36 cm.