Answer:
Answer is 150cm
Explanation:
Here
l = 120cm
B = 80cm
Rectangular tank contain 1440l of water
As as we know 1l = 1000cm^3
So 1440l = 1440000cm^3
Here,
volume of tank( volume of water) = l *b* h
or, 1440000cm^3= 120cm*80cm* h
or, 1440000cm^3= 9600cm^2* h
h = 150cm