Question

solve it please with solution​

Answer 1

Question :

A man sells a book at a profit of 20%. If he had bought it at 20% less and sold it for Rs. 18 less, He would have gained 25%. Find the cost price.

Answer:

(d) Rs. 90

Step-by-step explanation:

Let the Cost price be X

Selling Price of book = 120x/100

SP = 6x / 5

If the cost price was 80% of Original i.e. 4x / 5

The selling price was { 6x/5 - 18 }

Then profit was 25%

Profit = 6x/5 - 18 - 4x/5

Profit = 2x/5 - 18

Profit percent =

$\frac{ \frac{2x}{5} - 18}{ \frac{4x}{5} } \times 100 = 25$

On solving the above equation we get,

2x - 90 = x

x = Rs. 90

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