Question

The 80 kg student in the figure(Figure 1) balances a 1000 kg elephant on a hydraulic lift. the diameter of the piston the student is standing on=0.57m When a second student joins the first, the height difference between the liquid levels in the right and left pistons is 30 cm . What is the second student's mass? Express your answer to two significant figures and include the appropriate units.

Answer 1