The product of Hari's age in years on his last birthday and his age now in complete months is 1800. Hari's age on his last birthday was?
Answers
Given info : The product of Hari's age in years on his last birthday and his age now in complete months is 1800.
To find : Hari's age on his last birthday was...
solution : let Hari's age in years on his last birthday is x years
and let Hari's present age = (12x + y) months , where y lies between 0 to 12.
a/c to question,
x(12x + y) = 1800
⇒12x² + xy - 1800 = 0
⇒x = {-y ± √(y² + 86400)}/24
here x must be a positive integer.
from hit and trial methods, take y = 6
x = {-6 ± √(6² + 86400)}/24
= {-6 ± √(86436)}/24
= (-6+ 294)/24 [ taking only positive part ]
= 288/24
= 12
Therefore Hari's age on his last birthday was 12 years.
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Step-by-step explanation:
The product of Hari's age in years on his last birthday and his age now in complete months is 1800. Hari's age on his la...
https://brainly.in/question/10578123?utm_source=android&utm_medium=share&utm_campaign=question