A metal of 50000/77 kg/m3 is used to make the weights for measuring. But the dishonest shopkeeper purchases a tampered weight. The original weight should be a cylinder of 7 cm radius and 5 cm height. The tampered weight also looks same but inside the cylinder there is a hollow cylindrical region of 2.8 cm radius and 2.5 cm height. If honestly he could make 20% profit, what is the profit (%) he makes by dishonest method?

• A. 30 5/23
• B. 30 10/23
• C. 30 15/23
• D. 30 20/23
• E. 30 22/23