Let's say it takes about 5 seconds to count to ten out loud. How many years will it take to count out loud to a billion? Ignore leap years and round your answer to one decimal place.

Guest May 22, 2017

#1**+1 **

15.9 years. Crazy, isn't it?

These type of questions are best answered with proportions:

\(\frac{5secs}{10}=\frac{xsecs}{1000000000}\)

Cross multiply and solve:

\(5000000000=10x\)

\(x=500000000secs\) (5 hundred million seconds)

Now, let's use another proportion to solve for how many years:

\(\frac{31536000secs}{1yr}=\frac{500000000}{xyr}\)'

Cross multiply and solve again:

\(31536000x=500000000\)

\(x=\frac{500000000}{31536000}\approx15.9years!\)

That's insane! Almost 16 years!

TheXSquaredFactor May 22, 2017