Question

the radius and height of a cylinder are in the ratio 5:7 and its curved surface area is 5500 sq.cm . find its radius and height ​.

Answer 1

Answer:

7:12

Step-by-step explanation:

given r:h = 5:7

let r=5x and h=7x

volume=πr²h

550 = 22×5x×5x×7x/7

550 = 550x³

x³=1

x=1

radius = 5×1 = 5cm , height = 7cm

curved surface area = 2πrh=2×22×5×7/7=220cm²

total surface area = 2πr(r+h) = 2×22×5(5+7)/7 = 377.14cm²

ratio= 7:12

Answer 2

Answer:

I have attached the answer... hope it helps you..