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The length and breadth of a metal sheet are 3 . 124 m and 3 . 002 m respectively. The area of this sheet up to the correct number of significant figures is

Options

  1. A9 .378 m 2
  2. B9 .37 m 2
  3. C9 .378248 m 2
  4. D9 .3782 m 2

Correct answer

A. 9 .378 m 2

Step-by-step solution

Area of metal sheet = 3 .124 × 3 .002 m 2 = 9 .378248 m 2 Now, the result must have significant figures equal to the least of figures being multiplied, so, area of metal sheet = 9 .378 m 2 (four significant digits)

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