Question

The area of a square is $5.29c{m}^2$. The area of $7$ such squares taking into account the significant figures is

• A. $37c{m}^2$
• B. $37.0c{m}^2$
• C. $37.03c{m}^2$
• D. $37.030c{m}^2$

Answer 1

The correct option is C $37.03c{m}^2$

Given:

Area of square $=5.29c{m}^2$

Therefore,

Total Area $=A_1+A_2+\dots A_7$

$A+A+\dots 7times$

Total Area $=37.03c{m}^2$

Addition of $7$ terms all having $2$ terms beyond decimal, so final answer must have $2$ terms beyond decimal (as per rules of significant digits.)

Final Answer: (c)