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Manoj Kumar Sinha

· started a discussion

· 1 Months ago

Answer fault (Question:233458.0)

Radius should be taken in stead of diameter..otherwise answer should be 440

Question:
A hollow cylindrical tube 20 cm long, is made of iron and its external and internal radii are 8 cm and 6 cm respectively. The volume of iron used in making the tube is (Take \(\pi=\cfrac{22}{7}\))
Options:
A) 1760 cu.cm
B) 880 cu.cm
C) 440 cu.cm
D) 220 cu.cm
Solution:

Ans: (a)

Vivek Sager

· commented

· 1 Months ago

answer is clear.. ph(R sq. - r sq.)

Knowledge Expert

· commented

· 1 Months ago

The solution is pretty clear.
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