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Problem of the Week
Problem A
Video Viewing

Jo likes to watch videos. Sometimes she watches them at normal speed. However, she also has the option to watch them at \(\frac{1}{4}\) as fast as normal speed, \(\frac{1}{2}\) as fast as normal speed, or \(2\) times as fast as normal speed. The table below lists the normal play times for four videos and the speed at which Jo watches each one.

Normal Speed Time Speed Jo Watches Video At
Video A \(50\) seconds \(\frac{1}{4}\) speed
Video B \(2\) minutes \(15\) seconds normal speed
Video C \(1\) minute \(40\) seconds \(\frac{1}{2}\) speed
Video D \(6\) minutes \(20\) seconds \(2\) times speed

What is the total time Jo spent watching these four videos?


Themes: Geometry & Measurement, Number Sense