Pregunta de Matemática e suas Tecnologias #01a0e94a

It is known that 1 liter of Type A pesticide is sufficient for application over 0.5 hectares (ha), while 1 liter of Type B pesticide is sufficient for application over 0.4 ha. A farmer needs to buy, in this store, enough pesticide to apply over an area of 20 ha, in addition to obtaining one application mask.

The minimum amount, in reais, to be spent by the farmer is