# What is the mass in kg of a person who weighs 185 pounds?

#### Risposta:

"185 lb"~~"84.2 kg"

#### Spiegazione:

This question can be answered by using dimensional analysis.

The relationship between kilograms and pounds is "1 kg=2.20 lb".

This gives us two conversation factors:

"1 kg"/"2.20 lb" e "2.20 lb"/"1 kg"

Multiply the given dimension ("185 lb") by the conversion factor with the desired unit in the numerator. This will cancel the unit we wish to convert.

185" lb"xx(1" kg")/(2.20" lb")="84.2 kg" rounded to three significant figures.