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  • Two rods are of length (3.16  0.3)cm and (1.21  0.1) cm . What is their combined length? </

Two rods are of length (3.16 \pm 0.3)cm and (1.21 \pm 0.1) cm . What is their combined length? 

Option: 1

(4.37 \pm 0.1)cm


Option: 2

(4.37 \pm 0.6)cm


Option: 3

(4.37 \pm 0.4)cm


Option: 4

(1.282 \pm 0.3)cm


Answers (1)

best_answer

As we have learned

x=a+b=3.16+1.21=4.37cm

 \Delta X = \pm (\Delta a+ \Delta b) = \pm (0.3+0.1) = \pm 0.4cm\\\\ X \pm \Delta X = (4.37 \pm 0.4)cm

 

Posted by

Gaurav

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