Determine 7836

We want to cut a 90 cm long rod into two parts so that the longer part of the rod is 2 cm shorter than three times the shorter part. Determine the lengths of both parts of the rod.

Correct answer:

a =  67 cm
b =  23 cm

Step-by-step explanation:

a+b=90 a = 3b2  (3b2)+b=90  (3 b2)+b=90  4b=92  b=492=23  b=23  a=3 b2=3 232=67 cm



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