Question Number 101110 by bemath last updated on 30/Jun/20
Answered by bramlex last updated on 30/Jun/20
$${v}_{{simon}} \:=\:\mathrm{3}×{v}_{{Ian}} \\ $$$$\Rightarrow\frac{\mathrm{6}×\mathrm{50}}{{v}_{{Ian}} }\:=\:\frac{\mathrm{5}\left(\mathrm{100}+\mathrm{2}{x}\right)}{\mathrm{3}×{v}_{{Ian}} } \\ $$$$\mathrm{180}\:=\:\mathrm{100}+\mathrm{2}{x}\:\Rightarrow{x}\:=\:\mathrm{40}\:{m}\:\leftarrow{wide}\:{is}\:{the}\:{pool} \\ $$