Task: Question Answering
Input (English): Problem: the cross - section of a cannel is a trapezium in shape . if the cannel is 6 m wide at the top and 4 m wide at the bottom and the area of cross - section is 10290 sq m , the depth of cannel is ? 
Options: a ) 258 , b ) 260 , c ) 262 , d ) 264 , e ) 266
Output (English): a