brazil-enem 2012 Q159

brazil-enem · Other · enem__day2 Not Maths
Jorge wants to install heaters in his beauty salon to improve the comfort of his clients in winter. He studies the purchase of units of two types of heaters: model A, which consumes $600\mathrm{~g}/\mathrm{h}$ (grams per hour) of propane gas and covers $35\mathrm{~m}^{2}$ of area, or model B, which consumes $750\mathrm{~g}/\mathrm{h}$ of propane gas and covers $45\mathrm{~m}^{2}$ of area. The manufacturer indicates that the heater should be installed in an environment with an area smaller than its coverage area. Jorge will install one unit per environment and wants to spend the minimum possible on gas. The area of the salon that should be climatized is found in the following plan (environments represented by three rectangles and a trapezoid).
Evaluating all the information, it will be necessary
(A) four units of type A and no units of type B.
(B) three units of type A and one unit of type B.
(C) two units of type A and two units of type B.
(D) one unit of type A and three units of type B.
(E) no units of type A and four units of type B.
Jorge wants to install heaters in his beauty salon to improve the comfort of his clients in winter. He studies the purchase of units of two types of heaters: model A, which consumes $600\mathrm{~g}/\mathrm{h}$ (grams per hour) of propane gas and covers $35\mathrm{~m}^{2}$ of area, or model B, which consumes $750\mathrm{~g}/\mathrm{h}$ of propane gas and covers $45\mathrm{~m}^{2}$ of area. The manufacturer indicates that the heater should be installed in an environment with an area smaller than its coverage area. Jorge will install one unit per environment and wants to spend the minimum possible on gas. The area of the salon that should be climatized is found in the following plan (environments represented by three rectangles and a trapezoid).

Evaluating all the information, it will be necessary\\
(A) four units of type A and no units of type B.\\
(B) three units of type A and one unit of type B.\\
(C) two units of type A and two units of type B.\\
(D) one unit of type A and three units of type B.\\
(E) no units of type A and four units of type B.