Annabelle is taking the polar express all the way to the north pole! the polar express is 100 meters long and it takes 30 seconds to cross santa’s 400m ice bridge. what speed is the train going at?

Hey!

Hope this helps...

To solve this, we will be doing a semi-alternate route, but it will get us to our answer...

400 / 100 = 4

30 / 4 = 7.5 seconds

60 * 60 * 7.5 = 27,000 meters per hour

Lets plug it into our meters to miles formula...

27,000 / 1,609.344 ~ 16.777 miles per hour

So...

The answer is:  The Polar Express was going 27,000 meters per hour (or roughly close to 16.777 miles per hour)...

answer: what

step-by-step explanation:

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.