Question

The length, breadth and height of a cuboidal reservoir is 7 m, 6 m and 15 m respectively. 8400 l of water is pumped out from the reservoir. Find the fall in the water level in the reserve​

Answer 1

Answer:

20cm

Step-by-step explanation:

Volume of the reservoir $=lbh=7*6*15m^3=630m^3$

Volume of water pumped out $=8400l=8.4m^3$

∴ remaining water in the reservior $=630m^3-8.4m^3=621.6m^3$

but length and breadth are fixed ....

So, $lbh'=7m*6m*h'\\=>621.6m^3=42m^3*h'\\=>\frac{621.6}{42}m=h'\\=>h'=14.8m$

Hence, height drop $=h-h'=15m-14.8m=0.2m=20cm$

Answer 2

Answer:

Step-by-step explanation:

20