The iceberg height is 87 meters 6/7 under water. How many meters of the ice jerg is under water?

When people talk about the height of an iceberg, they mean only the surface of the iceberg. Let’s find what part it makes up:

1 – 6/7 = 1/7 – the ratio of the surface to the entire size of the iceberg;

1/7 * x = 87 – the size of the surface of the iceberg;

6/7 * x = 87 * 6 = 522 (m).

Answer: there is 522 meters of iceberg under water.