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Deekshitha asked in Physics

Kind and pl fast

Thank You
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Aamish Samotra answered this

Dear student. 18.425 cm + 7.21 cm + 5.0 cm = 30.635 cm. Performing addition, the number of significant figures in the sum must be equal to those in the number having the smallest number of decimal places. Such a number in the given example is 5.0 carrying only one decimal place. Hence the sum, 30.635 must be rounded to one decimal place yielding 30.6 cm. So option 4 is correct. Regards