Cost of a dozen pens is $R s 180$ and cost of $8$ ball pens is $R s 56$ . Find the ratio of the cost of a pen to the cost of a ball pen.

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Solution

$C o s t o f a d o z e n p e n s = R s . 180$
$Cos t o f a sin g l e p e n = \frac{180}{12} = R s . 15$
$Cos t o f 8 b a l l p e n s = R s . 56$
$Cos t o f a sin g l e b a l l p e n = R s . \frac{56}{8}$
$r a t i o o f t h e cos t a p e n t o t h e cos t o f a b a l l p e n$
$= \frac{cos t o f p e n}{cos t o f b a l l p e n} = \frac{15}{7} = 2.14$

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Cost of a dozen pens is Rs 180 and cost of 8 ball pens is Rs 56. Find the ratio of the cost of a pen to the cost of a ball pen.

Find the ratio of the price of a pencil to that of a ball pen. If pencil cost $R s . 96$ per score and ball pens cost $R s 50.40$ per dozen.

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