Question

How many ball bearings, each with a diameter of 1 cm, can be made using 5.24 cm3 of molten steel? A) 4. B) 7. C) 8. D) 10

Answer 1

First, solve for the volume of the ball bearings by the equation,
                                     V = πd³ / 6
Substituting the value of diameter given,
                              V = π(1 cm)³ / 6 = π/6 cm³ = 0.5236 cm³
Divide the amount of material given by this volume,
                                     n = 5.24 cm³ / 0.5236 cm³ = 10
Therefore, there are 10 ball bearings that may be formed.