A radio costs a shopkeeper Tk. 64. At what price must he sell it if he is to make a profit of 20% on the selling price?

A radio costs a shopkeeper Tk. 64. At what price must he sell it if he is to make a profit of 20% on the selling price? Correct Answer 76.80

for 20% profit, If cost price is 100 then selling price is 120⸫ " " " " 1 " " " " <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>120</mn><mn>100</mn></mfrac></math> ⸫ " " " " 64 " " " " <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mn>120</mn><mo>&#xD7;</mo><mn>64</mn></mrow><mn>100</mn></mfrac></math> = 76.80
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