Question

The masses of two bodies are measured to be 15.5±0.2 kg and 27.3± 0.3kg. What is the total mass of the two and the error in it?

Answer 1

Answer:

42.8±0.5kg

Explanation:

In such a case we will add individually both the error and the quantity separately

so,

15.5+27.3=42.8

0.2+0.3=0.5

The answer is 42.8±.5kg

Answer 2

Answer:

42.8±0.5 kg

Explanation:

add mass ± add delta mass