SOLUTION: How would I solve this for kj?: ln(kj/15) = 2ln(kj/60) The answer is kj = 240, but I am unsure as to how to get there. Thanks for your help.

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: How would I solve this for kj?: ln(kj/15) = 2ln(kj/60) The answer is kj = 240, but I am unsure as to how to get there. Thanks for your help.      Log On


   

Question 142458: How would I solve this for kj?:
ln(kj/15) = 2ln(kj/60)
The answer is kj = 240, but I am unsure as to how to get there. Thanks for your help.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
ln(kj/15) = 2ln(kj/60)
ln(kj) - ln(15) = 2ln(kj)-2ln(60)
ln(kj) = 2ln(60) - ln(15)
ln(kj) = ln[60^2/15]
ln(kj) = ln[4*60]
kj = 4*60
kj = 240
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Cheers,
Stan H.