Question

A hollow spherical shell is made of a metal of density 4.5 g per cm3. if its external and internal radii are 8cm and 9cm respectively, find the weight of the shell?

Answer 1

hope this will help u....!

Answer 2

Answer:

4091.985 g

Step-by-step explanation:

Outer radius of sphere = 9 cm

Inner radius of sphere = 8 cm

Volume of hollow sphere = $\frac{4}{3} \pi R^3 - \frac{4}{3} \pi r^3$

Volume of hollow sphere = $\frac{4}{3} times \frac{22}{7} \times  (9^3 - 8^3)$

Volume of hollow sphere = $909.33 cm^3$

Weight of 1 cubic cm = 4.5 g

Weight of 909.33 cubic cm = $4.5 \times 909.33=4091.985 g$

Hence the weight of the shell is 4091.985 g