Asked by aruna
A rectangular piece of card 12 cm by 20 cm
is rolled up to make atube(with no overlap)Find the radius of tube if
i) the long sides are joined
is rolled up to make atube(with no overlap)Find the radius of tube if
i) the long sides are joined
Answers
Answered by
Reiny
Take a sheet of printer paper and try it.
Doesn't the circumference of your tube equal the long side ?
So....
2πr = 20
r = 10/π
Doesn't the circumference of your tube equal the long side ?
So....
2πr = 20
r = 10/π
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