Multiple choice

The volume of a sphere is 2.42 cm3. The volume of 12 such spheres taking into account the significant figure is

  1. 29.04 cm3

  2. 29 cm3

  3. 29.0 cm3

  4. 29.1 cm3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

12 * 2.42 = 29.04. Significant figures: 2.42 has 3 sig figs, 12 is an exact number (or has at least 2). The result should be rounded to 3 sig figs, which is 29.0.

AI explanation

Multiplying the volume of one sphere by 12 gives a total mathematical volume of 2.42 cm³ times 12 = 29.04 cm³. The given value 2.42 cm³ has three significant figures, but the problem explicitly requires rounding the final answer based on significant figures. To report the answer correctly to three significant figures, the result is 29.0 cm³.

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