There is a missing part in the question. Found the complete text on internet:
"<span>What is the largest size vehicle (kg) it can lift if the diameter of the output line is 28.0 cm? "
Solution
The diameter of the piston is 28.0 cm, this means its radius is 14.0 cm (half the diameter), so the area of the piston is
</span>
<span>
The maximum pressure of the lift is
</span>
<span>
Therefore the maximum force the piston can lift is
</span>
<span>
And the size (the mass) of the vehicle is
</span>
<span>
</span>
"<span>What is the largest size vehicle (kg) it can lift if the diameter of the output line is 28.0 cm? "
Solution
The diameter of the piston is 28.0 cm, this means its radius is 14.0 cm (half the diameter), so the area of the piston is
</span>
<span>
The maximum pressure of the lift is
</span>
<span>
Therefore the maximum force the piston can lift is
</span>
<span>
And the size (the mass) of the vehicle is
</span>
</span>