Asked by Leila
A 4x7 rectangle can be rotated about the long side to generate a cylinder. It also can be rotated about the short side to generate a cylinder. Find the lateral area and surface area of the 2 cylinders .
PLEASE HOW. TELL ME
PLEASE HOW. TELL ME
Answers
Answered by
Steve
long side: r=4 and h=7, so
ends: πr^2 = 16π
lateral: 2πrh = 56π
similarly for short side, where r=7 and h=4
ends: πr^2 = 16π
lateral: 2πrh = 56π
similarly for short side, where r=7 and h=4
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