SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Pastimes : Laughter is the Best Medicine - Tell us a joke
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Henry Volquardsen who wrote (8918)3/12/1999 10:12:00 AM
From: Paul Moerman  Read Replies (1) of 62549
 
I was able to back in to the answer of 45, but asked my
daughter who is a college math major how she would have
solved it. Her solution is much more elegant than mine! ;-)

Let Bt = boiler age "then"
Bn = boiler age "now"
St = ship age "then"
Sn = ship age "now"

We know that Sn = 60 = 2Bt, so Bt = 30

Also, St = Bn.

Since the "then"s were at the same time and the "now"s
are at the same time, we can equate the differences:

Bn - Bt = Sn - St, substitute in what we know
Bn - 30 = 60 - St, and since St = Bn...
Bn - 30 = 60 - Bn, so
2Bn = 90 and Bn = 45.
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News