Question

How much oxygen will a closed class room of length breadth and height 10m 8m and 5m respectively contain? ( air contains 21% of oxygen )​

Answer 1

Answer:

84m^2

Step-by-step explanation:

l= 10m

b= 8m

h= 5m

volume= lbh = 10 x 8 x 5 = 400m^2

% of oxygen = 21%

amount of oxygen = 21% of v = 21/100 x 400

                              = 84m^2