Question

The external and internal diameter of a hollow cylindrical pipe are 10cm and 8 cm respectively .If its length will be 21 cm ,then find the metal used in its formation



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Answer 1

Answer:

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Given :-

R ( outer radius) = 5 CM

R ( inner radius) = 4 CM

H ( length/height) = 21 CM

A/Q :-

Metal used = volume of hollow cylinder

π ( r²-r²) h

22/7 (25-15) 21

22 × 10× 3

660cm²

Answer 2

Step-by-step explanation:

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The external and internal diameter of a hollow cylindrical pipe are 10cm and 8 cm respectively .If its length will be 21 cm ,then find the metal used in its formation

$\huge{\underline{\underline{\boxed{\sf{Answer}}}}}$

Given :-

R ( outer radius) = 5 CM

R ( inner radius) = 4 CM

H ( length/height) = 21 CM

A/Q :-

Metal used = volume of hollow cylinder

π ( r²-r²) h

22/7 (25-15) 21

22 × 10× 3

660cm²