Question

A well of diameter 8m is dug out up to 7m. Calculate the volume of the earth ​

Answer 1

Volume = 352 m³

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Answer 2

Answer:

• Volume of well = 352 m

Step-by-step explanation:

Given:

• Diameter of well = 8 m
• Radius of well = 4 m
• Height of well = 7 m

To Find:

• Volume of well

We know that,

$\longrightarrow \bf Volume\;of\;cylinder=\pi r^{2}h\\ \\ \\ \longrightarrow \sf Volume\;of\;cylinder=\dfrac{22}{7}\times 4\times 4\times 7 \\ \\ \\ \longrightarrow \sf Volume\;of\;cylinder=22\times 4\times 4\\ \\ \\ \longrightarrow \sf Volume\;of\;cylinder=352\;m^{3}$

Hence, volume of well = 352 m

Extra Info:

$\longrightarrow \sf Curved\;surface\;area\;of\;cylinder=2\pi rh\\ \\ \\ \longrightarrow \sf Total\;surface\;area\;of\;cylinder=2\pi r(r+h)\\ \\ \\ \longrightarrow \sf Volume\;of\;cylinder=\pi r^{2}h$

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