Task: Question Answering
Input (English): Problem: find the area of trapezium whose parallel sides are 20 cm and 18 cm long, and the distance between them is 11 cm.
Options: a. 335 cm 2, b. 209 cm 2, c. 285 cm 2, d. 825 cm 2, e. 725 cm 2
Output (English): b