Question

The inner and outer radii of a cylindrical pipe of 4 cm and 5 cm respectively find the area of cross section of the pipe use pi is equal to 3.14

Answer 1

$\huge{\underline{\underline{\mathrm{\blue{GIVEN:-}}}}}$

• Outer radius of Cylindrical pipe = 5 cm
• Inner radius of Cylindrical pipe = 4 cm
• Value of π = 3.14

$\huge{\underline{\underline{\mathrm{\blue{TO\:FIND:-}}}}}$

Find the Area of cross-section of the pipe = ?

$\huge{\underline{\underline{\mathrm{\blue{FORMULA\:USED:-}}}}}$

$\large{\boxed{\rm{\red{Area\: of \:cross-section = π(R-r)}}}}$

$\huge{\underline{\underline{\mathrm{\blue{SOLUTION:-}}}}}$

【We have to find the area of cross-section of Cylindrical pipe】

☞ On putting the values in the formula, we get

$\leadsto$$\rm{ Area\: of \:cross-section = π(R- r)}$

$\leadsto$$\rm{ Area = 3.14(5-4)}$

$\leadsto$$\rm{ Area = 3.14\times 1}$

$\leadsto$$\rm\red{ Area \:of\: cross-section = 3.14 {m}^{2}}$

$\large{\underline{\underline{\mathrm{\blue{FINAL\: ANSWER:-}}}}}$

$\large{\boxed{\boxed{\bf{\red{Area \:of\: cross- section = 3.14\: {cm}^{2}}}}}}$

Answer 2

$\large\underline\mathrm{Given:-}$

• outer radius of cylinder pipe = 5cm
• inner radius of cylinder pipe = 4cm
• π= 3.14

$\large\underline\mathrm{To \: find}$

• Area of cross section of the pipe?

$\large\underline\mathrm{Solution}$

$\implies$ Area of cross section = π(R - r)

$\implies$ Area = 3.14(5 - 4)

$\implies$ Area = 3.14 × 1

$\implies$ Area = 3.14m²