Question

the radius of two cylinder are in the ratio 3 ratio 2 and their height are in the ratio 4 ratio 5 calculate the ratio of their curved surface area​

Answer 1

Answer:

Curved surface Area

CSR of cylinder = 2πrh

here 2πr 1 hi:2πr 2h 2

= 2x πx3x4:2πx2x5

24π:20π = 6:5. Ans

Answer 2

Answer:

The answer for this question is 6:5.

Step-by-step explanation:

Formula for curved surface area of a cylinder is as - 2πrh

where r - Radius of cylinder

h - height of cylinder.

Now consider r1 and r2 be the radius of cylinders respectively,

and h1 and h2 be the height of cylinders respectively.

Now it is given that

r1/r2= 3/2

and h1/h2= 4/5

consider Curved surface area of 1st cylinder be A1 and that of 2nd cylinder be A2.

Now by formula,

A1/A2= 2πr1h1/2πr2h2

= r1h1/r2h2

= 3/2*4/5

= 6/5

therefore, the ratio of curved surface area of the given cylinders is 6:5