CAT
Exam
the of the ages of the father an sonsis 45 years .five years ago the product of their ages was 124 . determine present age?
49, 7 years
36, 9 years
64,14 years
none
Read Solution (Total 3)
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- 36, 9 years
36+9=45
(36-5)*(9-5)=31*4= 124 - 11 years agoHelpfull: Yes(5) No(0)
- let the age of father be x and that of son be y.
x+y=45;
5 years ago,
(x-5)*(y-5)=124,
xy-5(x+y)+25=124,
xy=324;
so (45-y)y=324;
y=36,9
somif x=36 then y=9; - 11 years agoHelpfull: Yes(0) No(1)
- 36,9...........x^2-45x+324=0...
- 11 years agoHelpfull: Yes(0) No(0)
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