The width of the rectangular room is 5 m, and the length is 4 m. How much varnish is required

The width of the rectangular room is 5 m, and the length is 4 m. How much varnish is required to cover the floor in this room, if 250 g of varnish are consumed per 1 m2.

1) calculate the floor area of the room:

5 * 4 = 20 m2.

2) Let’s compose and solve the proportion:

for 1 m2 of floor – 250 g of varnish,

for 20 m2 of floor – x g of varnish,

hence, we can write that 1: 20 = 250: x.

By the main property of proportion:

1 * x = 20 * 250,

x = 5000.

Therefore, to cover the floor in this room, x = 5000 g = 5 kg of varnish will be required.

Answer: you need 5 kg of varnish.