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Algebra

Blazing goIITian

 Joined: 6 Dec 2009 Post: 304
9 Jan 2010 15:07:56 IST
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Geeta is celebrating her birthday tomorrow. Next year, she will reach an age three times that of dau
Engineering Entrance , JEE Main , JEE Main & Advanced , Mathematics , Algebra

Geeta is celebrating her birthday tomorrow. Next year, she will reach an age three times that of daughter Sunita 11 years ago. Last year at this time, Sunita was exactly half of her age. How old is Geeta today?

Blazing goIITian

Joined: 6 Jun 2009
Posts: 366
9 Jan 2010 15:22:52 IST
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Cool goIITian

Joined: 14 Aug 2009
Posts: 50
9 Jan 2010 15:37:36 IST
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64 yrs..geeta (today), 65 yrs (tomorrow)

33 yrs...sunita

Blazing goIITian

Joined: 7 May 2007
Posts: 1724
9 Jan 2010 15:50:32 IST
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let the age of geeta when she celebrates her birthday tommorow be x

and sunita be y.

so, accd. to the ques.,

x = 3(y-11).

x-3y = -33.

x - 2 = 2 (y-2)

x - 2y = -2

x -3y = -33

so, y = 31.

x = 3 (20) = 60.

present age = x-1 = 59.

Blazing goIITian

Joined: 7 Dec 2007
Posts: 307
9 Jan 2010 19:56:12 IST
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geeta's 59, sunita's 30 :D

Blazing goIITian

Joined: 19 Jul 2009
Posts: 359
9 Jan 2010 21:41:48 IST
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geeta is 62 yrs old nd sunita is 32 yrs old

Blazing goIITian

Joined: 7 Dec 2007
Posts: 307
9 Jan 2010 21:57:56 IST
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o.O how?

if geeta's 62, then next year she wud be 63 and sunita - 33.

according to the question, next yr, geeta wud be 3 times sunita's age 11 years bak.

63 is not equal to 3*(33-11)

Blazing goIITian

Joined: 25 Jul 2009
Posts: 615
10 Jan 2010 16:30:25 IST
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kapil cvs nei sahi kiya hai ,, geeta's 59, sunita's 30 Itne young age se deevita u came on educational site ?? waise whats u r ambition >>>

Hot goIITian

Joined: 29 Mar 2009
Posts: 146
11 Jan 2010 01:09:19 IST
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Her current age is 73.. And tommorow she'll be 74

Blazing goIITian

Joined: 25 Jul 2009
Posts: 615
11 Jan 2010 14:38:03 IST
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age of sunita is 34 yrs and that of geeta is 67 years ,see we will form 2 equations ,itz a bit tricky first add 1 year to both their ages , then just making equation using above relation in x and y ,solve the 2 variable equations and get the answer , ih poe it is correct

Blazing goIITian

Joined: 6 Dec 2009
Posts: 304
14 Jan 2010 21:26:04 IST
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Let Geeta's age today be x.

Let daughter sunita age today be y.

Daughter Sunita 11 years ago was y-11.

x+1 = 3(y-11)

x-1 = 2(y-1)

If we solve these two equations we get x = 65 years and y = 33 years.

So today geeta's age is one day less than 65 years.

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