a hollow cylindrical pipe is 21 dm long . its outer and inner diameters are 10 cm and 6 cm respectively. find the volume of the copper used in making the pipe.
Answers
Answered by
92
You Need To Imagine A Bit Tho...
As The Pipe Is Hollow So The Volume Must Be Volume Of Larger Cylinder (With Greater Diameter) Minus The Volume Of Smaller Cylinder.
By Using Formula Of Volume Of Hollow Cylinder
πR²h - πr²h
22/7 * H * (R²-r²)
22/7 * 21 * 10 * (5²- 3²)
22 * 3 * 10 * 16
=10560 cubic cm.
Here's Ya Ans.
Plz Comment Down For Any Query.
Thanks.
As The Pipe Is Hollow So The Volume Must Be Volume Of Larger Cylinder (With Greater Diameter) Minus The Volume Of Smaller Cylinder.
By Using Formula Of Volume Of Hollow Cylinder
πR²h - πr²h
22/7 * H * (R²-r²)
22/7 * 21 * 10 * (5²- 3²)
22 * 3 * 10 * 16
=10560 cubic cm.
Here's Ya Ans.
Plz Comment Down For Any Query.
Thanks.
Answered by
44
given,
height = 21 dm = 210 cm, outer radius = 5 cm (R) , inner radius = 3 cm (r) .
so, volume = πR^2h - πr^2h = πh (R^2 - r^2)
= ( 22/7) * 210 * ( 25 - 9)
= (22/7) * 210 * 16 = 10560
hence the volume of the copper used in making the pipe is 10560 cm cube
height = 21 dm = 210 cm, outer radius = 5 cm (R) , inner radius = 3 cm (r) .
so, volume = πR^2h - πr^2h = πh (R^2 - r^2)
= ( 22/7) * 210 * ( 25 - 9)
= (22/7) * 210 * 16 = 10560
hence the volume of the copper used in making the pipe is 10560 cm cube
sunil205:
please comment about correct and incorrect
its ryt
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