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JEE Main 2019 (9 Apr, Shift 2) · Significant Figures & Order of Magnitude

Significant Figures & Order of Magnitude question from JEE Main 2019 (9 Apr, Shift 2)

Q11JEE Main 2019 · 9 APR · SHIFT 2Easy

Significant Figures & Order of Magnitude

The area of a square is 5.29 cm2. The area of 7 such squares taking into account the significant figures is :-

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Answer: (a)

  1. 7×5.29=37.03 cm27 \times 5.29 = 37.03\ \text{cm}^2
  2. 7 is an exact count, so the result keeps the 3 significant figures of 5.29.
  3. So the answer is (a) 37.0 cm237.0\ \text{cm}^2.
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