c
પ્રતિ સેકન્ડ આવતું  દળ \(\left( {\frac{{{\text{dm}}}}{{{\text{dt}}}}} \right)\,\, = \,\,\frac{{A\ell d}}{t}\,\, = \,\,Avd\)

\(n \) ગણું પાણી તેટલાજ સમયગાળા માં મેળવવા \(\,{\left( {\frac{{{\text{dm}}}}{{{\text{dt}}}}} \right)^\prime }\,\, = \,\,n\,\left( {\frac{{dm}}{{dt}}} \right)\,\,\,Av'd\,\, = \,\,\,n(Avd)\,\, \Rightarrow \,\,v'\, = \,\,nv\)

\(F\,\, = \,\,v\frac{{dm}}{{dt}}\) અને \(\,{\text{F}}\,\, = \,\,{\text{v'}}{\left( {\frac{{{\text{dm}}}}{{{\text{dt}}}}} \right)^\prime }\,\, \Rightarrow \,\,\frac{F}{F}\,\,\, = \,\,\frac{{V'{{\left( {\frac{{dm}}{{dt}}} \right)}^\prime }}}{{V\left( {\frac{{dm}}{{dt}}} \right)}}\,\, = \,\,\frac{{nV\left( {n\frac{{dm}}{{dt}}} \right)}}{{V\left( {\frac{{dm}}{{dt}}} \right)}}\,\,\, = \,\,{n^2}\,\, \Rightarrow \,\,F'\,\, = \,\,{n^2}F\)

\(P\,\, = \,\,Fv\,\,\, \Rightarrow \,\,\,\frac{{P'}}{P}\,\, = \,\,\frac{{F\,v'}}{{Fv}}\,\,\, = \,\,\frac{{\left( {{n^2}F} \right)(nv)}}{{Fv}}\,\,\, = \,\,{n^3}\,\, \Rightarrow \,\,P'\,\, = \,\,{n^3}P\)