Предмет: Математика, автор: veronikf

Количество кирпичей необходимое для строительства стены можно вычислить по формуле N=61lh, где l - длина, h - высота стены(в метрах) 
а)вычислите сколько кирпичей требуется  для кладки 1м в квадрате стены.
б)сколько кирпичей ушло на кладку стены  длиной 4,5м и высотой 3,5 м?в)Какой высоты стену можно сложить, если имеется 150 кирпичей и длина стены должна быть 3 м? (ответ округлите до десятых) выразите h через N и l.г)Какой длины кирпичный барьер можно построить, если имеется 150 кирпичей и высота барьера должна быть 0,5м?(ответ округлите до единиц) Выразите l через N и h .

Ответы

Автор ответа: simsim00
0
а) N=61*1*1=61шт;
б) N=61*4.5*3.5=960.75;
в) 150=61*3*h отсюда h=150/(61*3)=0.8м;
г) 150=61*l*0.5, отсюда l=150/(61*0.5)=5м
l=N / (61*h)
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