The cost price of the sunglass for Meenu when he purchased it for the first time was 1000 rupees, and he sold it to Kanu at
20% profit. Hence, the selling price of the sunglass is 1200 rupees, which Kanu purchased. Hence, the profit made by Meenu is
(1200−1000)=200 rupees.
Hence, the cost price of the same sunglass for Kanu is 1200 rupees, and now he sold it to Meenu at a
20% loss. Hence, the selling price of the sunglass now is
(1200⋆0.8)=960 rupees.
The cost price of the same sunglass for Meenu when he purchased it for the second time was 960 rupees. Now Meenu sold it Tanu, at a certain price such that the total profit of Meenu becomes 500 rupees.
Hence, on the second transaction (selling it to Tanu), Meenu made a profit of
(500−200)=300 rupees.
Hence, the profit made by Minu in the second transaction is (300/960)*
∗00%=31.25%The correct option is C