Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
20=\sqrt{(30-4.1t)^2+(40-2.8t)^2}
20=\sqrt{(30-4.1t)^2+(40-2.8t)^2}
Natural Language
Math Input
Extended Keyboard