1.

the total surface area of a right circular cylinder is 2112cm2 and the radius of its base is 14cm . find the height​

Answer»

TSA=2\pi rh+2\pi r^2\\2112=2\pi r(h+r)\\2112=2\pi *14(h+14)\\\\h+14=\frac{2112*7}{2*14*22} \\\\h+14=\frac{1056}{2*22} \\\\h+14=\frac{528}{22}\\ \\h+14=24\\h=24-14\\h=10cm



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