Akhil bought 13 kg of apples for Rs 2,400. He sold them at profit equal to the selling price of 7 kg of apples. Find the selling price of apples per kg.

Rs 400

The cost price of the apples per kg = $\frac{2400}{13}$ = CP

Let the selling price per kg = SP 

According to the question,

Profit = 7SP

We know, profit = SP - CP

⇒ 7SP = 13SP - 13CP

⇒ 6SP = 13SP

⇒ SP = 13/6 CP

we substitute the value of CP,

⇒ SP = $\frac{13}{6}$ x \(\frac{2400}{13}\)

         = Rs 400