Answer:
[tex]m_{w} = 1.2 kg[/tex]
Explanation:
Let consider the bucket as a straight cylinder. The scale measure the mass of water contained in the bucket. The mass contained as a function of time is:
[tex]m_{w} = \rho_{w} \cdot \dot V \cdot \Delta t\\m_{w} = (1000 \frac{kg}{m^{3}})\cdot (0.3 \frac{L}{s} ) \cdot (\frac{1 m^{3}}{1000 L} ) \cdot (4 s) \\m_{w} = 1.2 kg[/tex]
