The difference between discount of 35% and two successive discount of 20% on a certain bill was 22, the amount of the bill is = ?

Answer: Option D

1st discount = 35%
Single equivalent discount of 20% each
$$\begin{array}{rl}& =\left(20+20-\frac{20\times 20}{100}\right)\%\\ & =36\%\\ & \text{Difference}\\ & =\left(36\%-35\%\right)\\ & =1\%\end{array}$$
Let the amount of the bill Rs. x
$$\begin{array}{rl}& \therefore \frac{1}{100}x=22\\ & x=\text{Rs}\text{. }2200\end{array}$$