You are determining the mass of an object using a triple beam balance. When the pointer is lined up with the zero mark, the riders show values of 300 grams, 20 grams, and 8.10 grams.

Question

What is the mass of the object?
• A. 272.10 grams
• B. 328.10 grams
• C. 439.10 grams
• D. 48000 grams

Answer 1

To determine the mass of the object using the readings from the triple beam balance, you simply need to add the values indicated by the riders.

The riders show the following values:

• 300 grams
• 20 grams
• 8.10 grams

Now, add these values together:

\[ 300 , \text{g} + 20 , \text{g} + 8.10 , \text{g} = 328.10 , \text{g} \]

The mass of the object is therefore \(328.10\) grams.

The correct answer is: • B. 328.10 grams