Vanita bought pens worth some rupees.She bought notebooks worth three times more the worth of pens.For this she paid rs.80 to shopkeeper.Findad out how much amount she had spent for notebooks and pens?

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Solution

Suppose , Vanita bought pens worth 'x' rupees.
The amount of the notebooks, she bought is 3x rupees.
The total amount of both pens and notebooks (x+3x) rupees is given Rs.80.
$∴ x + 3 x = 80$
$∴ 4 x = 80$
$∴ x = \frac{80}{4}$
$∴ x = 20$
She must have bought pens worth Rs.20.
She must have bought notebooks worth Rs.3x=3(20)=Rs.60.

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Vanita bought pens worth some rupees.She bought notebooks worth three times more the worth of pens.For this she paid rs.80 to shopkeeper.Findad out how much amount she had spent for notebooks and pens?

Suppose , Vanita bought pens worth 'x' rupees.The amount of the notebooks, she bought is 3x rupees.The total amount of both pens and notebooks (x+3x) rupees is given Rs.80.∴x+3x=80∴4x=80∴x=804∴x=20She must have bought pens worth Rs.20.She must have bought notebooks worth Rs.3x=3(20)=Rs.60.