Question

A pound is approximately 0.45 kilogram. A persons weighs 87 kilograms. What is the persons’s weight, in pounds, when expressed to the correct number of significant figures

Answer 1

Answer : The person's weight in pounds is, $1.9\times 10^2\text{ pounds}$

Solution :

As we are given a pound is approximately 0.45 kilogram. Now we have to need to determine the weight of a person of 87 kilogram.

As, 0.45 kilogram weight of a person is equal to 1 pound

So, 87 kilogram weight of a person is equal to $\frac{87Kg}{0.45Kg}\times 1\text{ pound}=1.9\times 10^2\text{ pounds}$

Therefore, the person's weight in pounds is, $1.9\times 10^2\text{ pounds}$