Download Aptitude Crack
img not found img not found

Volume and Surface Area

Q1:

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:

A 3.6 kg

B 3.696 kg

C 36 kg

D 36.9 kg

ANS:B - 3.696 kg

External radius = 4 cm, Internal radius = 3 cm.

Volume of iron
= 22 x [(4)2 - (3)2] x 21 cm3
7
 
= 22 x 7 x 1 x 21 cm3
7
  = 462 cm3.
 Weight of iron = (462 x 8) gm = 3696 gm = 3.696 kg.



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.