[tex]750 \text {-gallon tank} \longrightarrow 35 \text { minutes}[/tex]
[tex]1 \text {-gallon tank} \longrightarrow 35 \div 750 \text { minutes}[/tex]
[tex]1 \text {-gallon tank} \longrightarrow \dfrac{1}{150} \text { minutes}[/tex]
[tex]1000 \text {-gallon tank} \longrightarrow \dfrac{7}{150} \times 1000 \text { minutes}[/tex]
[tex]1000 \text {-gallon tank} \longrightarrow \dfrac{7000}{150} \text { minutes}[/tex]
[tex]1000 \text {-gallon tank} \longrightarrow \dfrac{140}{3} \text { minutes}[/tex]
[tex]1000 \text {-gallon tank} \longrightarrow 46\dfrac{2}{3} \text { minutes}[/tex]
[tex] 46\dfrac{2}{3} \text { minutes} \longrightarrow 46 \text { minutes and } 40 \text { seconds} [/tex]
