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satish narayan chaudhary

· started a discussion

· 1 Months ago

CORRECTION (Question: 233458.0 )

BHAI ITS R2-r2 and not D2-d2. 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)

VIJENDER DAHIYA

· commented

· 1 Months ago

yes it should be 440
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