the radius of two cylinder are in the ratio 3 ratio 4 and their Heights are in the ratio 5 ratio 3 find the ratio of their curved surface area
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CSA of cylinder =2πrh
let the radius be 3x and 4x and height be 5x&3x respectively
CSA of 1st cylinder=2π3x5x
CSA of 2nd cylinder=2π4x3x
Their ratio=(2π3x5x)÷(2π4x3x)
=5:4
let the radius be 3x and 4x and height be 5x&3x respectively
CSA of 1st cylinder=2π3x5x
CSA of 2nd cylinder=2π4x3x
Their ratio=(2π3x5x)÷(2π4x3x)
=5:4
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