A rectangular sheet of metal foil with dimensions 66 cm by 12 cm is rolled to form a cylinder of height 12 cm. find the volume of the cylinder ......plz post the correct answer .......
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Hey buddy here is your answer :
Length of metal sheet = 66cm
Breadth = 12cm
The height of the cylinder so formed = 12 cm
That means the circumference of the cylindrical top is 66 cm
2 pi r = 66cm
2 × 22 / 7 × r = 66
44r / 7 = 66
44r = 7 × 66
44r = 462
r = 462 / 44
r = 10.5 cm
Volume of cylinder = pi r2 h
= 22 / 7 × 10.5 × 10.5 × 12
= 22 / 7 × 10.5 × 10.5 × 12
= 22 / 7 × 105 / 10 × 105 / 10 × 12
= 11 × 3 × 21 × 6
= 33 × 21 × 6
= 4158 cm3
Hope it helps.
Have a good day buddy.
Length of metal sheet = 66cm
Breadth = 12cm
The height of the cylinder so formed = 12 cm
That means the circumference of the cylindrical top is 66 cm
2 pi r = 66cm
2 × 22 / 7 × r = 66
44r / 7 = 66
44r = 7 × 66
44r = 462
r = 462 / 44
r = 10.5 cm
Volume of cylinder = pi r2 h
= 22 / 7 × 10.5 × 10.5 × 12
= 22 / 7 × 10.5 × 10.5 × 12
= 22 / 7 × 105 / 10 × 105 / 10 × 12
= 11 × 3 × 21 × 6
= 33 × 21 × 6
= 4158 cm3
Hope it helps.
Have a good day buddy.
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