Question

Russell wants to weigh out 35 milligrams (mg) of a powder. He notices that his school's new electronic balance shows weight only in grams (g). The ratio of grams to milligrams is 1 : 1,000. How many grams of powder does Russell need to weigh out?

Answer 1

ANSWER:

0.035 grams

WORKING OUT:

35 divided by 1000 = 0.035

Answer 2

Russell needs to weigh out 0.035 grams of powder.

Explanation:

Suppose, the weight of the powder in grams
`= x`

Given that, the weight of the powder is 35 milligrams.

The ratio of grams to milligrams is
`1:1000`

According to the given ratio, we will get......

`(x)/(35)=(1)/(1000)\\ \\ 1000x=35\ \ [by\ cross\ multiplication]\\ \\ x=(35)/(1000)\\ \\ x=0.035`

So, Russell needs to weigh out 0.035 grams of powder.