A spherical object has a diameter of 18 cm. It has a spherical inner core with a diameter of 9 cm.

What is the volume of the other layer?
Use 3.14 to approximate pi and express your answer in hundredths.

_____cm3

Question

A spherical object has a diameter of 18 cm. It has a spherical inner core with a diameter of 9 cm.
 
What is the volume of the other layer?
Use 3.14 to approximate pi and express your answer in hundredths.
 
  _____cm3

campbell_st · Answer

so the radius of the object is 9 cm

the radius of the core is 4.5 cm 

then using the formula for a sphere

$$V = \frac{4}{3} \times \pi \times r^3$$

the volume of the outer layer = Volume of large sphere - volume of inner core

hope it helps

anonymous · Answer

Okay thank you :) It helps, I had forgot the formula lol

anonymous · Answer

I got 2670.57  is that correct?

anonymous · Answer

@campbell_st

campbell_st · Answer

yes that's what I got

anonymous · Answer

Ok thank you but it says express answer in hundredths