How many British pounds would it cost to buy a pair of American designer jeans costing $45 if the exchange rate is 1.50 dollars per British pound？

How many British pounds would it cost to buy a pair of American designer jeans costing $45 if the exchange rate is 1.50 dollars per British pound？
A.30 British pounds
B.10 British pounds
C.20 British pounds
D.50 British pounds
正确答案：30 British pounds