Subtract $0.2 J$ from $7.26 J$ and express the result with correct number of significant figures.

7.1 J

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7.06 J

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7 J

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7.0 J

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Solution

The correct option is A $7.1 J$
Correct option is (a).

Rule: In addition or subtraction, the final result should retain as many decimal places as are there in the number with the least decimal places.

7.26 - 0.2 = 7.06 J

Rounding off to 1 decimal place.

So final result $= 7.1 J$

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Similar questions

7.1 J, 7.2 J a n d 6.7 J

EXPRESS THE RESULTS OF THE FOLLOWING CALCULATION TI THE APPROPRIATE NUMBER OF SIGNIFICANT FIGURES.

6.24*0.0866 / 5.006+7.04

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