Question

The radii of two cylinders are in the ratio of 4 : 5and their heights are in the ratio of 7 : 6 . Find the ratio of their lateral surface areas

Answer 1

The ratio of their lateral surface area is 14:15

Given :

Radius ratio = 4:5

Height ratio = 7:6

So,their radii = 4r and 5r (Let r = variable)

And,their heights = 7h and 6h (Let h = Variable)

So, their lateral surface areas = (2π×4r×7h) and (2π×5r×6h)

Ratio= (2π×4r×7h) : (2π×5r×6h)

= 28:30

= 14:15 (answer)

Answer 2

Answer:

14:15

Step-by-step explanation:

I hope you have understood