Task: Question Answering
Input (English): Problem: a reduction of 10 % in the price of tea enables a dealer to purchase 25 kg more tea for rs . 22500 . what is the reduced price per kg of tea ? 
Options: a ) rs . 70 , b ) rs . 80 , c ) rs . 90 , d ) rs . 100 , e ) none
Output (English): c