If radii of two cylinders are in the ratio 4 : 3 and if their hieghts are in the ratio 5 : 6, find the ratio of their curved surfaces
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the curved surface area for 1st triangle=2π(4k)(5h)
and the curved surface area for 2nd triangle =2π(3k)(6h)
so their ratio =2π(4k)(5h)/2π(3k)(6h)=20/18=10/9
and the curved surface area for 2nd triangle =2π(3k)(6h)
so their ratio =2π(4k)(5h)/2π(3k)(6h)=20/18=10/9
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