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.
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