Question

7. The radii of two right circular cylinder are
in the ratio 2:3 and their heights
are in the
ratio 5: 1, then find the ratio of their
curved surface areas .​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

hey here your answer

Step-by-step explanation:

Let the radii of 2 cylinders be 2r and 3r respectively and their heights be 5h and 4h respectively.

Let S1 and S2 be the curved surface areas of two cylinders.

S1 → CSA of cylinder of radius 2r and height

5h=S1 =2×π×2r×5h=20πrh

S2 → CSA of cylinder with radius 3r and

height 4h=S2 =2×π×3r×4h=24πrh

∴ S1/S2=20πrh/24πrh=5/6

∴S1:S2 =5:6.