A buoy in a lake is 20 yards from Dock 1 and 20 yards from Dock 2. To the nearest tenth of a centimeter of a yard; how far apart are the two docks?

Please check my answer. Thank you.
id it 17.3 yards?? I'm lost

1 answer

could be, depending on where the docks are.

The docks could be anywhere from 0 to 40 yards apart.