Quinten sees three buildings downtown and decides to estimate their heights. He knows from a book on local buildings that the one in the middle is 100 feet tall. The one on the left looks like it is 80% of the height of the middle one. The one on the right looks 20 feet shorter than if the building on the left and middle were stacked on top of each other. How tall does Quinten estimate their total height to be?
Квинтен се бинои маркази шаҳрро мебинад ва қарор мекунад, ки баландии онҳоро тахмин кунад. Вай аз китобе дар бораи биноҳои маҳаллӣ медонад, ки бинои миёна 100 фут баланд аст. Бинои чап ба назар мерасад, ки 80% аз баландии бинои миёна аст. Бинои рост ба назар мерасад, ки 20 фут кӯтоҳтар аз он аст, ки агар бинои чап ва миёна якдигарро боло гузоранд. Квинтен тахмин мекунад, ки баландии умумии онҳо чанд аст?
How tall is the building on the left? ** He estimates the building on the left is 80 feet tall because 100 x .8 = <<100*.8=80>>80
How tall is the building on the left and middle? ** The combined height of the left and middle is 180 because 100 + 80 = <<100+80=180>>180
How tall is the building on the right? ** The building on the right he estimates as 160 feet because 180 - 20 = <<180-20=160>>160
How tall is the building on the left, middle, and right? ** He estimates the combined height as 340 feet because 80 + 100 + 160 = <<80+100+160=340>>340
#### 340
How tall is the building on the left? ** Вай тахмин мекунад, ки бинои чап 80 фут баланд аст, зеро 100 x .8 = <<100*.8=80>>80  
How tall is the building on the left and middle? ** Баландии умумии бинои чап ва миёна 180 фут аст, зеро 100 + 80 = <<100+80=180>>180  
How tall is the building on the right? ** Вай тахмин мекунад, ки бинои рост 160 фут аст, зеро 180 - 20 = <<180-20=160>>160  
How tall is the building on the left, middle, and right? ** Вай тахмин мекунад, ки баландии умумии 340 фут аст, зеро 80 + 100 + 160 = <<80+100+160=340>>340  
#### 340