Question

Jan has some metal that she is going to make

into solid metal spheres.
Each sphere will have a radius of 2.15 cm.
Jan has 1490 cm³ of metal.
(a) Work out an estimate for the number of spheres that Jan can make.

Answer 1

35

Explanation:

the volume of a sphere is 4/3 times π times r to the power of 3. you get 41.6 cm to the power of 3. you than devide 1490 cm to the power of 3 with 41.6 cm to the power of 3. you get 35.8. becquse 0.8 sphere isnt complete you get 35 spheres

Answer 2

35

Explanation:

V = 4/3 · r³ · π

V = 4/3 · 2.15³ · π

V = 4/3 · 9.938375 · π

V = 41.629768 cm³

1490 : 41.629768 = 35.791696