Question

Hollow spheres with a radius of 8 cm whose shell is 2.5 cm thick. About how much chocolate will go into making wash sphere?

Answer 1

Answer:

2080 cm³ (correct to 3sf)

Step-by-step explanation:

Volume = (4/3) × 3.14 × [8³ - 2.5³]

= 2078.156667 cm³

Answer 2

About $2078.20cm^3$ chocolate will go into making wash sphere .

Step-by-step explanation:

Here we have , Hollow spheres with a radius of 8 cm whose shell is 2.5 cm thick.  We need to find  About how much chocolate will go into making wash sphere .Let's find out:

Basically we need to find the volume of hollow sphere , We know that volume of hollow sphere is :

⇒ $Volume = \frac{4\pi }{3}(r_1^3-r_2^3)$            .............(1)

According to question ,

$r_1=8cm\\r_2=2.5cm$

Putting these values in equation (1) :

⇒ $Volume = \frac{4\pi }{3}(8^3-2.5^3)$

⇒ $Volume = \frac{4\pi }{3}(496.38)$

⇒ $Volume = \frac{4(3.14) }{3}(496.38)$

⇒ $Volume =2078.20cm^3$

Therefore , About $2078.20cm^3$ chocolate will go into making wash sphere .