Question

ajutati ma si pe mn plss​

Answer 1

 

$\displaystyle\bf\\Latura~patratului ABCD~este:\\AB=AD=300~cm\\\\Aria~unei~placi~de~gresie~este:\\Apg=400~cm^2\\\\Latura~unei~placi~de~gresie~este:\\Lpg=\sqrt{Apg}=\sqrt{400}=20~cm\\\\Aflam~numrul~de~placi~de~gresie~care~incap~pe~un~rand.\\\\ n=\frac{300}{20}=15~placi/rand\\\\Numarul~de~placi~folosite~este:\\Npf=15\times15=\boxed{\bf225~de~placi}\\\\Raspuns~corect"~~a)$