Task: Question Answering
Input (English): Problem: apple costs l rupees per kilogram for first 30 kgs and q rupees per kilogram for each additional kilogram . if the price of 33 kilograms is 168 and for 36 kgs of apples is 186 then the cost of first 20 kgs of apples is 
Options: a ) 3.69 , b ) 3.66 , c ) 3.6 , d ) 100 , e ) 3.61
Output (English): d