Yes, for both of your questions. According to these articles, they eat much more than that.
http://en.wikipedia.org/wiki/Blue_whale#Description_and_behaviour
http://en.wikipedia.org/wiki/African_elephant
1. Does only one baby blue whale drink 200 liters of its mother's milk every day?
2. Does only one African elephant eat about 200 kg of plants a day?
1 answer