Diameter of the football players' piston?

[benedict9999]

Homework Statement

A 54.0 kg cheerleader uses an oil-filled hydraulic lift to hold four 130 kg football players at a height of 1.40 m. If her piston is 18.0 cm in diameter, what is the diameter of the football players' piston?

Homework Equations

The Attempt at a Solution

54 /18^2 = 520/x^2
x= 55.85696 cm

What am i doing wrong?

 

[Delphi51]

Run that through your calculator again; looks like a calculation error.
Might be worth writing out the cross multiplication step.

 

[benedict9999]

it's not... I still get the same answer running it through my calculator

 

[Borek]

Why do you think it is wrong?

Sig figs perhaps?

Edit: I must admit thread subject made me wonder if it is not XXX site link spam...

 

[Delphi51]

Sorry, I made the mistake! Checked it again and got your answer.