Question

The inner diameter of a wooden cylindrical pipe is 24cm and its outer
diameter is 28cm. The length of the pipe is 35cm. Find the volume of the wood

please answer the question quickly with explanation I will mark you as BRAINLIST please
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Answer 1

Step-by-step explanation:

first we have to find area of inner diameter

r = d/2 = 24cm/2 = 12cm

circumference of circle =

$\pi \times r ^{2}$

circumference of circle = (22/7) X (12cm)²

= (22/7) X 144cm²

= 452cm² (approximately)

then we have to find area of outer diameter

r = d/2 = 28cm/2 = 14cm

circumference of circle =

$\pi \times r {}^{2}$

circumference of circle = (22/7) X (14cm)²

= (22/7) X 196cm²

= 22 X 28cm²

= 616cm² (exact)

then we have to subtract the area of inner diameter from outer diameter.

Required area = outer area - inner area

= 616cm² - 452cm²

= 164cm²

then we have to multiply the required area into length of the wood and then finally we will get the answer.

volume of wood = required area X length of wood

= 164cm² X 35cm

= 5740cm^3 [approximately]

so the first answer is correct 5720cm³. You just have to do same as I did and you will get full marks in this question.