Source: Extra Practice
The length, breadth and thickness of a rectangular sheet of metal are 4.234 m, 1.005 m, and 2.01 cm respectively. The volume of the sheet to correct significant figures is:
Options
Option A is correct
0.0855 m³
Option B
0.0855289 m³
Option C
0.08553 m³
Option D
0.086 m³
Explanation
Volume = length × breadth × thickness = 4.234 m × 1.005 m × 0.0201 m = 0.0855289... m³. Since the thickness (2.01 cm = 0.0201 m) has 3 significant figures, the result must be rounded to 3 significant figures, giving 0.0855 m³. 0.08553 and 0.085529 have too many significant figures. 0.086 has too few.