Question (21/90)
The marked price of a watch was USD 720. A man bought the same watch for USD 550.80 after getting two successive discounts, the first being 10%, what was the second discount rate ?(A)  12%
(B)  13%
(C)  14%
(D)  15%
Question (22/90)
The difference between a discount of 35% and two successive discounts of 20% on a certain bill is USD 22. Find the amount of bill in USD ?(A)  USD 400
(B)  USD 1000
(C)  USD 1800
(D)  USD 2200