# Who’s Faster, a Train or a Plane?

Here's your nightly math! Just 5 quick minutes of number fun for kids and parents at home. Read a cool fun fact, followed by math riddles at different levels so everyone can jump in. Your kids will love you for it.

# Who’s Faster, a Train or a Plane?

March 28, 2018

It would be so great if we humans could just stand up and fly away like birds do. We could get everywhere so much faster. But for now, we’re stuck riding cars, trains, boats or planes. So our friend Vasily M. asked, what’s the fastest you could get from New York to Los Angeles by train? (and drew this great picture to go along with it!) Well, that depends on the distance traveled, and the speed of the fastest train out there. There’s no train track that runs a perfect straight line from New York to LA. But if there were, it would be just 2,448 miles long, compared to 2,787 miles on the roads. Then we’d put the world’s fastest train on that track: The Shanghai Maglev line zooms at 268 miles per hour! On a straight coast-to-coast track, that train could reach California in just 9 hours 8 minutes. Luckily, a plane can fly it in about 5 1/2 hours, and that’s a lot less work.

Wee ones: If you take the 9-hour train trip and your friend flies a 5-hour flight, who takes less time to do the trip?

Little kids: If you take the 9-hour train and your friend flies in 5 hours, how much faster is your friend’s trip? Bonus: If you take the super-speedy train to LA on the 2nd day of the month, then back to New York the 5th day, then back to LA the 8th day…when do you go back to New York to keep the pattern?

Big kids: If your track ends up 2 miles longer than the 2,448 miles you hoped for, how long is it?  Bonus: What’s the latest minute you could get on the 9-hour-8-minute train in LA time and reach New York the same day (11:59 pm), given that L.A.’s clocks are 3 hours behind New York?

The sky’s the limit: If you built a 300-mph train, then slowed it by 1/2, then slowed that new speed by 1/3, then slowed that new speed by 1/4, what fraction of your original speed is your train’s final speed?