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JEE Main 20199 AprilEvening Shift
Exam
JEE Main
Year
2019
Date
9 April
Shift
Evening Shift
Subject
Physics
Chapter
Mathematics in Physics

JEE Main 2019 · 9 April · Evening Shift · Physics · Mathematics in Physics

The area of a square is 5.29c m ^ 2 . The area of 7 such squares...

The area of a square is 5.29cm2.5.29c{m}^{2} . The area of 77 such squares taking into account the significant figures is:

Options

  1. A37.03cm237.03c{m}^{2}
  2. B37.030cm237.030c{m}^{2}
  3. C37.0cm237.0c{m}^{2}
  4. D37cm237c{m}^{2}

Correct answer

A. 37.03cm237.03c{m}^{2}

Step-by-step solution

Given,
Area of square =5.29cm2= 5.29c{m}^{2}
Area of 77 square =5.29+5.29+5.29+5.29+5.29+5.29+5.29=37.03cm2= 5.29 + 5.29 + 5.29 + 5.29 + 5.29 + 5.29 + 5.29 = 37.03c{m}^{2}
{5.29 has 2 significant digits after decimal. Accordingly, the answer should also have two significant digits after decimal}.
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