Question

A book was sold for a certain sum and there was a loss of 30%. Had it been sold
for Rs. 15 more, there would have been gain of 30%. What would be profit if the
pen was sold for Rs.7.5 more than what it was sold for?​

Answer 1

Answer:

no loss no profit

Step-by-step explanation:

let us consider that the cp of book was x

now loss of 30 % and gain of 30 % is equal to 15 RS

it means 60% = 15 RS

then co of book = 100% =?

=> 100/60 × 15 = 25 RS

cp of book is 25 rs

then solded price was 70/100 × 25 = (70bcoz of 30% loss)

70/4 = 35/2

* now sold for 7.5 more

ie = 35/2+ 75/10

35/2+15/2

= 50/2 = 25 RS

cost price = 25

selling price = 25

which means there is no loss and no profit

Answer 2

Given :   A book was sold for a certain sum and there was a loss of 30%. Had it been sold  for Rs. 15 more, there would have been gain of 30%.  

To find : What would be profit if the  pen was sold for Rs.7.5 more than what it was sold for

Solution:

Let say Cot price =  C   Rs

Loss = 30 %  = (30/100)C = 0.3C  Rs

Selling Price = C - 0.3C = 0.7C    Rs

Slod for Rs 15 more

Selling price = 0.7C + 15 Rs

Profit = 0.7C + 15 - C  = 15 - 0.3C  Rs

Profit =  (30/100)C =  0.3C

=> 15 -0.3C = 0.3C

=> 0.6C = 15

=> C = 25

Cost price = Rs 25

Earlier Selling price = 0.7C = 0.7*25 = 17.5  Rs

New Selling Price = 17.5 + 7.5 = 25 Rs

Selling Price = Cost Price

Hence no profit no loss

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