Archive
28th of March 2017
Mathematics
Q:

The length,breadth and height of cuboidal tank are 150,120 and 110 cm respectively.The tank has 129600cm3 of water on it.100 porous rocks each having dimensions 20cmx10cmx10cm are placed in a tank.Calculate the rise in water level of tank,if each brick absorbs 1/10 of its own volume?

Vikas Mahajan - CBSE - Class VI

Tuesday, March 28, 2017 at 17:57:PM

A:

Volume of tank = 150×120×110 = 1980000 cm3 
Volume of each brick = 20x10x10 = 2000 cm3 
Volume of 100 bricks= 200000 cm2 
Absorbed water volume = 200000/10 = 20000 cm3 
So, volume of water which rises

= 200000 - 20000 
= 180000 cm3 
height of water = 129600/150×120= 7.2 cm 


rise in water

= (180000+129600)/(150 × 120) - 7.2 

= 17.2 - 7.2= 10 cm

Tuesday, March 28, 2017 at 19:18:PM