You have two block of clay in cube form and the edges are 10 cm. How many spheres with a radius of 5 cm can you make with that amount of clay?

Question

campbell_st · Answer

Volume of a cube is V = 10^3 
                                     = 1000cm^3

2 cubes have a volume of 2000 cm^3

Volume of a sphere is 

$$V = \frac{4}{3} \pi r^3$$

or in your question 

$$V = \frac{4}{3} \pi 5^3$$

Once you have the volume of 1 cube with radius 5 cm divide that into the volume of the 2 cubes

$$Number of Spheres = \frac{2000}{\frac{4}{3}\pi 5^3}$$

campbell_st · Answer

oops one you have the volume of 1 sphere divide into the volume of the 2 cubes

anonymous · Answer

Im not sure if my answer is right but i have "3 Sphere"
but thank you @campbell_st for explaining it..

campbell_st · Answer

thats the answer I got... 3.8... which means only 3