Question

the radius and height of a cylinder are in the ratio of 5:7 and the volume is 550 cm cube. find the radius

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Answer 1

yaar ye tho both hard hai

Answer 2

Let the radius = r = 5x and height = h = 7x

So, the volume of the cylinder = π r² h

= 22/7 x (5x)² x 7x

= 22/7 x 25x² x 7x

= 22 x 25x (cube) (7 gets cancelled)

But it is given that volume = 550 cm cube

 So, 22 x 25x (cube) = 550

x (cube) = 550 / 22 x 25

x(cube) = 1 ( as 22 x 25=550 and 550 is both in nm and dm)

x = ∛1 

x = 1

so radius = 5x = 5 x 1 cm = 5cm (Ans.)

HOPE ITS HELP YOU....... ✌