Question

If A = 2.231 cm and B = 3.1 cm, then A + B with correct significant figure is
(1)5.331 cm
(2)5.33 cm
(3)5.3 cm
(4)5.0 cm​

Answer 1

Answer:

option (1)

• 5.331 cm

Explanation:

Given -

$A = 2.231 cm \\ and \\ B = 3.1 cm \: \: \: \:$

Solution -

$A \: + \: B = 2.231 \: cm + 3.1 \: cm = 5.331 \: cm$

Answer 2

Answer:

Correct significant figure is (3) 5.3 cm

Explanation:

A = 2.231 cm

B = 3.1 cm

A + B = 2.231 + 3.1 = 5.331

But according to the rule of addition "the sum should be expressed in minimum decimal places."

Hence the significant figure is 5.3.