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

Question

The area of a square is 5.29 cm2. The area of 7 such squares taking into account the significant figures is : (A) 37 cm2 (B) 37.0 cm2 (C) 37.03 cm2 (D) 37.030 cm2

Tardigrade Admin · Accepted Answer

Total Area = A1 + A2 + ...... A7 = A + A + ......... 7 times = 37.03 cm2. 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.)

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

$37 c m^{2}$

$37.0 c m^{2}$

$37.03 c m^{2}$

$37.030 c m^{2}$

Total Area = $A_{1} + A_{2} + ...... A_{7}$
= $A + A + .........7$ times
= $37.03 c m^{2}$ .
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.)

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

37cm2

37.0cm2

37.03cm2

37.030cm2