The outer and the inner radi of a hollow sphere are 12 cm and 10 cm. F

1.	The outer and the inner radi of a hollow sphere are 12 cm and 10 cm. Find its volume.In a throw of a die, find the probability of not getting 4 or 5.
Answer» From this information we have to find the volume Outer radius (R) = 12 cm Inner radius (r)= 10 cm Volume of hollow sphere =(4/3)Π (R³ - r³) =(4/3)(22/7)(12³ - 10³) =(88/21)(1728- 1000) =(88/21)(728) =(64064/21) =3050.67cm³ Total no of outcomes=6 No of possible outcome=1,2,3,6 So, No of outcomes = 4 Probability of not getting 4 or 5 = 4/6 = 2/3

The outer and the inner radi of a hollow sphere are 12 cm and 10 cm. Find its volume.In a throw of a die, find the probability of not getting 4 or 5.

Answer»

From this information we have to find the volume

Outer radius (R) = 12 cm

Inner radius (r)= 10 cm

Volume of hollow sphere =(4/3)Π (R³ - r³)

=(4/3)(22/7)(12³ - 10³)

=(88/21)(1728- 1000)

=(88/21)(728)

=(64064/21)

=3050.67cm³

Total no of outcomes=6

No of possible outcome=1,2,3,6

So, No of outcomes = 4

Probability of not getting 4 or 5

= 4/6

= 2/3