# Normal weight

If we assume that all human bodies are geometrically similar (this is true only on average), it is possible to calculate the normal weight people for their growth. The average height is 1,75 meters, and the average weight - 65 kilograms. Resulting in these calculations results may seem surprising to many. Assume that you are below average height of 10 cm. What weight is normal for you?

In common parlance is often solve this problem as follows: take off with a normal weight %, which is a 10 cm range from normal growth. In this case, for example, reduce the 65 kg weight in 10/175 and the resulting 62 kg considered normal.

This is a wrong calculation. Proper normal weight is obtained if figuring it out of proportion:

65: x = 1,753 : 1,653.

Where:

x = 65/1,2 = about 54 kg.

The difference with the result obtained is usually very large - 8 kg.

On the contrary, for the person whose height is 10 cm higher than the average, normal weight is calculated from the ratio:

65:х= 1,753 : 1,853.

From this x = 78 kg - 13 kg more than the average. This amendment is much greater than commonly thought.

What is, in this case, should be the ratio between the normal weight of the giant and the normal weight small adult man? Many seem unlikely that the giant can be 50 times heavier than the small man. However, this results in the correct geometrical calculation.

One of the highest growth giants had 278 cm. Its growth is a meter higher than normal human growth. On the contrary, the smallest adults man reach about 75 cm - a meter below the normal growth. What is the ratio of the volume and weight of the giant to the volume and weight of an adult small man? It is equal to:

2753 : 753 or 113 : 33 = 49,3 (rounded).

So the giant weighs fifty of the small people!