Tray

If the water level in the tray shaped as a cuboid is 420 liters and the bottom dimensions are 120 cm and 70 cm, what height reaches the water level?

Final Answer:

h =  50 cm

Step-by-step explanation:

$$\begin{gathered} V=420\text{l}\to {\text{cm}}^3=420\cdot 1000{\text{cm}}^3=420000{\text{cm}}^3 \\ a=120\text{cm} \\ b=70\text{cm} \\ S=a\cdot b=120\cdot 70=8400{\text{cm}}^2 \\ V=Sh \\ h=V/S=420000/8400=50\text{cm} \end{gathered}$$

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