A rectangular water tank contains 1440 litres of water. If its length is 120cm and breadth is 80cm, find the height of the water level in the tank.(1 litre=1000cm cube.)

Answer is 150cm

Step-by-step 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

volume of tank( volume of water) = l *b* h

or, 1440000cm^3= 120cm*80cm* h

or, 1440000cm^3= 9600cm^2* h

h = 150cm

Step-by-step explanation:

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional