Question

A stone is an English measure of weight. There are 14 lb in 1 stone and 2.2 lb in 1 kg. A certain person weighs 9 stone. (a) If you wanted to convert the person’s weight to kilograms, what conversion factor should you use? Show your work. (d) What is the person’s weight in kilograms?

Answer 1

1 stone = 14 lb
2.2 lb = 1 kg
weight of the person = 9 stone
(a)We would use mass weight conversion factor.
(b) 9 stone = 9 x 14 lb
= 126 lb
So,
126 lb = 1/2.2 x 126
= 57.27 kg