Question

Answer these three questions with process please

Answer 1

Answer;

A6-

Let each side of the cubical tank measures am.

Volume of  water when the tank is full =  15.625 m3

∴ Capacity of tank = 15.625 m3

⇒ a3 = 15.625 m3

⇒ a = 2.5 m

⇒ Depth of tank = 2.5 m

Depth of water = 1.3 m

∴ Depth of empty tank = 2.5 m - 1.3 m = 1.2 m

Volume of used water = Volume of empty tank = 2.5 m × 2.5 m × 1.2 m = 7.5 m3.

A7-

l= 10m = 100cm

b=24m=2400cm

h=4m=400cm

volume of wall= lbh= 100*2400*400= 96000000cm cube

dimensions of brick= 24*10*8 cm

volue of each brick = 24*10*8 cm = 1920cm cube

let the no. of bricks be n

n*volume of each brick= volume of each wall

therefore, n= volume of the wall / volume of each brick

n=96000000 / 1920 cm cube

i.e.  n=50000

thus, no. of bricks required = 50000

A8- i am not sure