Question

Find the radius of the cylinder with height 6 cm with volume 54 cubic cm

Answer 1

We know, Volume of a Cylinder = πr²h

Now, Substitute all the given values, 
54 = 3.14 * r² * 6

54 = 18.84 * r²

r² = 54/18.84

r = √2.866

r = 1.7  [ After rounding-off ]

In short, Your Answer would be: 1.7 cm

Hope this helps!

Answer 2

V = pi r^2 h
54 = 3.14 * r^2 * 6
54 = 18.84 r^2
Divide both sides by 18.84
r^2 = 2.866
Square root both sides
r = 1.7