Question

if the price of pen decrease by20% then a man can buy 10 pens for 100 rupees what is the new price of each pen​

Answer 1

Answer:

Step-by-step explanation:

Let the price of the pen =Rs X

No of pens he purchase for Rs 100= 100/X

New price of the pen=X x 80/100

                                 = 4/5X ....... (1)

No of pens he can purchase for Rs 100 with reduced cost=100 / 4/5X

                                                                                                 =100 x 5X/4

                                                                                                  =125/X

According to question

125/X -100/x = 10

25/X =10

X=2.5

put the value of X in (1) equation

New price of the pen =4/5 x 2.5

                                    =2

So the new price of the pen is RS 2