At 100 cubic meters, the volume of oxygen is 21

At 100 cubic meters, the volume of oxygen is 21 cubic meters. How many cubic meters of oxygen is contained in a gym 20 m long, 12 m wide, 3, 5 high?

Let’s calculate the area of the sports hall:

20 * 12 = 240 m2 – the area of the sports hall.

Let’s calculate the volume of the sports hall:

240 * 3.5 = 840 m3 – the volume of the sports hall.

Let’s calculate the volume of oxygen in the gym, making up the proportion and expressing the volume of the required oxygen through q:

100 m3 – 21 m3,

840 m3 – q.

q = 840 * 21: 100;

q = 17640: 100;

q = 176.4 m3 – the volume of oxygen in the gym.

Answer: the volume of oxygen in the gym is one hundred seventy six point four cubic meters.