Question

Two Physical auantities A and B measured with
the help of
Instrument
A=(10+-0.1)and B = (20+-0.2) the Value of A+B will be ????​

Answer 1

Given:

$A = 10 \pm 0.1 \: and \: B = 20 \pm 0.2$

To find:

Value of A + B ?

Calculation:

• The integral values have to be used to perform the operations as required required (i.e. +,-,×,÷).

• However, the errors should always be added.

$A + B =( 10 \pm 0.1) + ( 20 \pm 0.2)$

$\implies A + B =( 10 + 20) \pm (0.1 + 0.2)$

$\implies A + B =30\pm 0.3$

So, value of A + B is $30\pm 0.3$