Task: Question Answering
Input (English): Problem: weights of two friends ram and shyam are in the ratio 6 : 5 . if ram ' s weight is increased by 10 % and total weight of ram and shyam become 82.8 kg , with an increases of 15 % . by what percent did the weight of shyam has to be increased ? 
Options: a ) 19 % , b ) 10 % , c ) 21 % , d ) 16 % , e ) none
Output (English): c