By selling an item at a 10% profit a seller makes a profit of Rs. 777.70. Find the cost price of the item.

Correct option is B

Given:  

Profit = 777.7 

​Solution:​

Let the cost price of the article = 100 unit 

then the profit 10% of 100 unit = 10 unit 

According to the question 

10 unit = 777.7 

1 unit = 77.77 

Cost price of the article 100 unit = $$100\times77.77 = 7777$$​​

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