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Sagot :
Answer:
The mass of the second student is 60 kg.
Explanation:
Note: It is assumed that radius of piston is 0.23 m and density ρ is 850 kg/m^3 and mass of first student is 55 kg.
There occurs a change in pressure on a piston when some mass is added on the other piston.
This change of mass on the piston is given by the formula,
Δm=ρhA/g
where A is the area of piston.
Given h=35 cm or 0.35 m, change in mass is,
Δm=850*(0.35)*π*(0.23)^2 / 9.8
Δm=5.0 kg
Therefore, the mass of the second student is 55+5=60 Kg
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