Answer:
\[t=10s\] \[m=100\,kg\] \[h=20\,m\] \[g=10\,\,m/{{s}^{2}}\] \[P=\frac{w}{t}=\frac{mgh}{t}=\frac{100\times 10\times 20}{10}\] \[=200\,w\] \[=2\,kw\]
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