Let the C.P of the TV = x when x is in Rs.
∴ 25% profit = x×25100=x4 and the S.P. = x+x4=5x4.
In the second case, by the given condition, the profit is 25% of 5x4
= 5x4×25100=5x16.
∴ The difference in profits = 5x16−x4=x16.
Now 5% of the C.P. + Rs. 100= x×5100+100=x20+100.
So, by the given condition, we have
x16=x20+100
⇒x16−x20=100
⇒x80=100
⇒x= Rs. 8000
So,the cost price of the TV = Rs. 8000
Ans- Option B.