Question

Give me the ryt answer--'plz....

Volume of cylinder pipe is 784 cm sq. Its length is 14 cm and external radius is 9 cm. Find the thickness.

Answer 1

$\textsf{Hey !!..}$

The answer goes here....

_______________________________________

》To find -

Thickness.

》Given -

Volume = $784\:cm^{2}$

Length, h = $14\:cm$

External radius, $R$ = $9\:cm$

》Solution -

Let us assume that the internal radius is $r$.

Since, we know that -

⇒ Volume = $\pi (R^{2}-r^{2})h$

⇒ $784$ = $\frac{22}{7}(9^{2}-r^{2})\times 14$

⇒ $784$ = $44\times (9^{2}-r^{2})$

⇒ $\frac{784}{44}$ = $(9^{2}-r^{2})$

⇒ $17.8$ = $(81-r^{2})$

⇒ $r^{2}$ = $81-17.8$

⇒ $r^{2}$ = $63.2$

⇒ $r$ = $\sqrt{63.2}$

⇒ $r$ = $7.94$

Now, the thickness -

⇒ $9-7.94$

⇒ $1.06$

So, the thickness of the cylindrical pipe is 1.06 m.

_______________________________________

$\textsf{Thanks !!..}$

Answer 2

Hope this helps you dude ✌️✌️☺️☺️✅✅