Aptitude - Volume and Surface Area - Discussion
Discussion Forum : Volume and Surface Area - General Questions (Q.No. 5)
5.
A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weighs 8 g/cm3, then the weight of the pipe is:
Answer: Option
Explanation:
External radius = 4 cm,
Internal radius = 3 cm.
| Volume of iron |
|
||||||
|
|||||||
| = 462 cm3. |
cm3
Weight of iron = (462 x 8) gm = 3696 gm = 3.696 kg.
Discussion:
60 comments Page 4 of 6.
Suba sanjeev .m said:
8 years ago
I am not getting this, can you explain clearly?
Venugopal said:
1 decade ago
Can you tell me the formula for Volume of iron?
Nats said:
1 decade ago
External radius - thickness = internal radius.
Bala said:
3 years ago
@Dinesh.
Thank You for your good explanation.
Thank You for your good explanation.
(2)
Sunil said:
6 years ago
Why 4 square minus 3 square equals to 7 * 1.
Tomsy said:
9 years ago
Please, someone explain me by step by step.
Ravi said:
9 years ago
Surface area of iron cube of side 10cm is?
Divya said:
1 decade ago
Why [4]^2-[3]^2 while calculating volume?
Manojit said:
1 decade ago
As the thickness of the pipe is 1 cm.....
Sanjay said:
9 years ago
1 hectares is equal to how many cm cube?
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