a rectangular sheet of paper is 22cm in length and10cm in width. it is rolled into a cylinder along its length. find the surface area of this cylinder
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3
if rectangular sheet paper is rolled along ots length ,Then
Length= circumference =22cm
and
width = height = 10cm
circumference = length of the sheet
2×pi ×r = 22
2×22/7 ×r = 22
44/7 × r = 22
r = 22×7 /44
r = 3.5cm
T.S.A. of cylinder = 2pi ×r (h+r)
= 2×22/7 × 3.5 (10+22)
= 704 cm^2 ans_
Length= circumference =22cm
and
width = height = 10cm
circumference = length of the sheet
2×pi ×r = 22
2×22/7 ×r = 22
44/7 × r = 22
r = 22×7 /44
r = 3.5cm
T.S.A. of cylinder = 2pi ×r (h+r)
= 2×22/7 × 3.5 (10+22)
= 704 cm^2 ans_
princelumar:
answer does not matcb
Sorry to point out but he/she did the second last step wrong.
In the bracket radius should be 3.5 instead of 22
In the bracket radius should be 3.5 instead of 22
yes that is only i want to tell you through this comment
ok
Answered by
1
Curved surface area=220 cm
Total surface area =220+77=297cm
Total surface area =220+77=297cm
outstanding
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