Đáp án:
Giải thích các bước giải:
\(\begin{array}{l}
{A_1} = 5{A_2}\\
{t_1} = 3{t_2}\\
- - - - - - - \\
{P_2} = ?{P_1}
\end{array}\)
Ta có: \(P = \frac{A}{t}\)
Suy ra:
\(\begin{array}{l}
\frac{{{P_1}}}{{{P_2}}} = \frac{{\frac{{{A_1}}}{{{t_1}}}}}{{\frac{{{A_2}}}{{{t_2}}}}} = \frac{{{A_1}{t_2}}}{{{A_2}.{t_1}}} = \frac{{5{A_2}.{t_2}}}{{{A_2}.3{t_1}}} = \frac{5}{3}\\
\Rightarrow {P_2} = \frac{3}{5}{P_1}
\end{array}\)