Task: Question Answering
Input (English): Problem: tanks a and b are each in the shape of a right circular cylinder. the interior of tank a has a height of 10 meters and a circumference of 8 meters, and the interior of tank b has a height of 8 meters and a circumference of 10 meters. the capacity of tank a is what percent of the capacity of tank b ?
Options: a. 90 %, b. 50 %, c. 60 %, d. 70 %, e. 80 %
Output (English): e