Two trains leave the same station in opposite directions. One travels at 70 km/h and the other at 90 km/h. How far apart are they after 3 hours?
Opening the drawing…
MathBrush is being tested with a few parent groups, and every solution on the site is open to them. If you were given a code, it goes in once and this device remembers it. 65 worked examples are free to everyone without one.