Given the rationale, provide a reasonable question and answer. Step-by-step reasoning process: Jim has 30 + 20 = 50 toads. Sarah has 50 * 2 = 100 toads.
 The question and answer:
Tim has 30 toads. Jim has 20 more toads than Tim does. Sarah has twice as many toads as Jim does. How many toads does Sarah have?
The answer is 100