Though the average specimen in captivity might live 25 or 35 years, an old koi named Hanako, from Mino province in Japan, has been shown to be over 215 years old based on analysis of her scales, and other 100+ year old fish are known from the same pond. Koi, like wild carp, can grow to 36 or more under perfect conditions.
The gold and silver medals weigh 412 grams (0.9 pounds) and the bronze medal weighs 357 grams (0.78 pounds). They are the biggest and heaviest summer Olympic medals ever made.
One ton of any material will equal the same, two thousand pounds.  So one ton of gold and one ton of silver would both weigh the exact  same, but the volume of each item wouâ¦ld differ. Since gold is  denser there would be less of it necessary to reach one ton of  weight than the silver.