2. How many tonnes does an average blue whale eat in a week? A. 19.3 to 39.7 B. 27.4 to 53.9 C. 25.2 to 51.1 3. True or False: Is the Blue Whale the largest known animal ever on the planet? 4. How many tonnes can a blue whale weigh up to? 5. How long can a blue whale grow up to? SCROLL DOWN FOR ANSWERS!!!