an iron pipe is 21 m ling and its exterior diameter is 8 cm if the thickness of pipe is 1 cm and weight of iron is 8gm/cm^3 find pipe’s weight
Answers
Answer:
In this type of question, we need to subtract external radius and internal radius to get the answer using the volume formula as the pipe is hollow. Oh! line become a bit complicated, sorry for that, lets solve it.
External radius = 4 cm
Internal radius = 3 cm [because thickness of pipe is 1 cm]
\begin{aligned}
\text{Volume of iron =}\pi r^2h\\
= \frac{22}{7}*[4^2 - 3^2]*21 cm^3\\
= \frac{22}{7}*1*21 cm^3\\
= 462 cm^3 \\
\end{aligned}
Weight of iron = 462*8 = 3696 gm
= 3.696 kg
Step-by-step explanation:
Please support SIR JEE ACADEMY YouTube Channel SUBSCRIBE NOW
Class 9 10 11 12 and JEE PREPARATION of Maths
SIR JEE ACADEMY It is completely free for everyone.
This is my hero teacher channel. In this channel all NCERT solutions of Maths class 9,10,11,12 would be provided. You can ask queries of maths class 9,10,11,12 and mains and Advance level questions.
JEE PREPARATION : MAINS AND ADVANCE
All the lectures would be provided and previous years questions practice would be done. Doubt session would be provided.
He is doing a lot for us , so we should also support him by giving like , sharing it all needies and SUBSCRIBING the channel NOW.