Question

Find out the height of a cylinder with a circular base of radius 70 cm and volume 154000 cubic cm.

Answer 1

Explanation:

Given:-

In a cylinder

Radius =r=70cm

volume =V=154000cm^3

To find:-

Height =h

Solution:-

as we know that

in a cylinder

${:}\longrightarrow$${\boxed{Volume={\pi}{r}^{2}h}}$

${:}\longrightarrow$$154000={\frac {22}{{\cancel {7}}}}×{{\cancel {(70)}}}^{2}×h$

${:}\longrightarrow$$154000=22×70×h$

${:}\longrightarrow$$70h={\frac {154000}{22}}$

${:}\longrightarrow$$70h=7000$

${:}\longrightarrow$$h={\frac {7000}{70}}$

${:}\longrightarrow$$h=100$

${:}\longrightarrow$${\underline{\boxed{\bf {Height=100cm}}}}$

Answer 2

Answer:

All sounds originate in the vibrations of material objects. The source of all sound waves is vibration. In a piano, violin, or guitar, a sound wave is produced by vibrating strings. In a saxophone, a reed vibrates; in a flute, a fluttering column of air at the mouthpiece vibrates.