PHYSICS
posted by DAN .
Allegra's favorite ride at the BarrelOFun Amusement Park is the Flying Umbrella, which is lifted by a hydraulic jack. The operator activates the ride by applying a forcce of 72 N to a 3.0cmwide cylindrical piston, which holds the 20000. N ride off the ground. What is the diameter of the piston that holds the ride?

Is it 32.57 cm?

pressure1=pressure2
force1/area1=force2/area2
force1/diam1^2=force2/diam2^2
diameter2= sqrt(force2/force1) * diameter1
= sqrt (20,000/72)* 3cm
= a little over 60cm 
thanx!!