Răspuns :
PS=√(50²+40²)=√(2500+1600)=√4100=10√41
inaltimea acvariului =AP=√[(50√2)²-(10√41)²]=√(5000-4100)=√900=30 cm
inaltimea acvariului =AP=√[(50√2)²-(10√41)²]=√(5000-4100)=√900=30 cm