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Gaurav Seth 6 years, 11 months ago
Given,
Thickness of the pipe = 0.7cm
inner radius of the pipe (r )= 3.5cm
External radius of the pipe (R ) = (3.5+ 0.7)cm or,4.2cm
length=5dm or,50cm
We know,
Total surface area of pipe = 2π (r+ R ) ( h+ R - r)
or, Total surface area of pipe= 2×22/7(3.5+4.2)(50+4.2-3.5)
= 44/7 × 7.7 × 50.7
=2453.88cm2
So the answer should be 2453.88cm2
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The irrational numbers are all the real numbers which are not rational numbers, the latter being the numbers constructed from ratios of integers.
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Vaishnavi Poste 6 years, 10 months ago
0Thank You