Math, asked by shephali, 1 year ago

5 years ago parvathi age was 4 times her son. the sum of their present ages is 55. find parvathi present age

Answers

Answered by vigneshwarreddp15vc1

Let parvati's age be x.
Let her son's age be y.
Five years ago, parvati's age will be x+5.
Five years ago, parvati's son's age will be y-5.
Given that,5 years ago, parvati's age is four times her son's age. So,
4(y-5)=x-5
4y-20=x-5
4y-x=15. Let this be equation 1.
Also given that their present ages sum up to 55. So,
x+y=55. Let this be equation 2.
When we add equations 1 and 2,
We get
4y-x+x+y=15+55
5y=70
y=14
Substitution of y in equation 2, we get
14+x=55
x=55-14
x=36
Parvati's age is 36 and her son's age is 14.

utkbkkh: wrong

shephali: correct

vigneshwarreddp15vc1: Can you tell what went wrong? utkbkkh

notryanjacob: the last part is wrong

notryanjacob: the son's age is 14 so (14-5)=9yrs is his age 5 yrs ago, now (9*4)=36 and (36+5)=41yrs gives us the current age. the correct answer is 42 years and 36 years id Paravthi's age 5 yrs ago

notryanjacob: OR, 55-14 is not 36 but it is 41years. that is the correct answerr

Answered by purkaitstuti

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