Goi the h cua 2 thanh lan luot la x;y va ti le vs 15 ;25
Ap dug t/c cua day ti so = ta co,
\(\frac{x}{15}=\frac{y}{25}=\frac{x+y}{15+25}=\frac{80}{40}=2\)2
\(\Rightarrow\frac{x}{15}=2\Rightarrow x=2\cdot15=30\)
\(\Rightarrow\frac{y}{25}=2\Rightarrow y=2\cdot25=50\)
Vay V cua 2 thanh la : \(30m^3;50m^3\)