Question

The radius and height of a cylinder are in the ratio 5:7 and it's volume is 550cm^3. Find it's radius. ​

Answer 1

Hey buddy ❤️❤️

Answer:

❤️❤️

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

Hope it helps you ✌️✌️❤️❤️

Answer 2

Step-by-step explanation:

please see picture hope it can help