Question

With the money Kanak has, she can purchase either 30 pens or 50 pencils. She spends only 80% of her money and buys 10 pens. With the remaining money, a maximum of how many pencils can she buy?

Answer 1

Answer:

She buy maximum 4 pencils.

Step-by-step explanation:

Given : With the money Kanak has, she can purchase either 30 pens or 50 pencils. She spends only 80% of her money and buys 10 pens.

To find : With the remaining money, a maximum of how many pencils can she buy?

Solution :

Kanak can buy either 30 pen or 50 pencil,

Cost of 30 pens are equal to cost of 50 pencils.

Cost of 1 pen = $\frac{50}{30}$ of cost of 1 pencil.

Kanak has spent 80% of money to buy 10 pens.

In 80%, she bought 10 pens so in 20% of remaining money she can buy

$\frac{20\times 10}{80} = \frac{20}{8}\text{ pens}$

Total pencil she can buy in remaining amount is $\frac{50}{30}\times \frac{20}{8}$

$=\frac{25}{6}\approx 4.16$

So, She buy maximum 4 pencils.