Four times the area of the curved surface of a cylinder is equal to 6 times the sum of the area of its bases. If its height is 14cm, find the curved surface area.
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area of sum of its bases =πr^2+πr^2=2πr^2
acc to qus
6×2πr^2=4×2πrh
12×22/7×r^2=8×22/7×14×r
12×r^2=112r
r^2/r=112/12
r=112/12
csa=2×22/7×112/12×14
=821.333cm^2
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