Question

if a fruit seller give one rupees five oranges then then he get 40% profit what is the cost price of in one rupees oranges ​

Answer 1

Fruit Seller sell 5 oranges for ₹1

Means

₹1=5 oranges

1 orange=₹1/5

He get Profit of 40%

Let CP of 1 orange=₹x

SP of 1 orange=₹1/5

Profit=40%

We know

$cp + (cp \times profit\%) = sp \\ \\ x + (x \times 40\%) = \frac{1}{5} \\ \\ x + \frac{2x}{5} = \frac{1}{5} \\ \\ \frac{5x + 2x}{5} = \frac{1}{5} \\ \\ \frac{7x}{5} = \frac{1}{5} \\ \\ x = \frac{1}{5} \times \frac{5}{7} \\ \\ x = \frac{1}{7}$

Means CP of 1 orange=₹1/7

In ₹1 He sells=5 oranges

Then CP of 5 oranges

$x = \frac{1}{7} \times 5 \\ \\ x = \frac{5}{7} \\ \\ = 0.71$

CP of 5 oranges=₹0.71

CP of 5 oranges=70 paise