Пошаговое объяснение:
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Sorry, I didn't understand anything
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Об'єм зміниться у 27 разів.
Формула для знаходження об'єму така: V=abc, де V- об'єм, a, b, c - ребра прямокутного паралелепіпеда .
Якщо кожне ребро збільшити в три рази, то V₂=3a*3b*3c=3³abc=27abc
\frac{V_{2}}{V} = \frac{27abc}{abc} =27
V
V
2
=
abc
27abc
=27
Отже об'єм другого прямокутного паралелепіпеда більший від об'єму першого прямокутного паралелепіпеда в 27 разів.
Взагалі якщо всі ребра прямокутного паралелепіпеда збільшити на будь яке число,то об'єм збільшиться на це число в кубі (тричі перемножене саме на себе)
Пошаговое объяснение:
первое х
второе 1,2х
100%-10%90%= что составляет 90/100=0.9
третье 1,2х*0,9=1,08х
(х+1,2х+1.08х)/3=1,64
3,28x=1,64*3
x=1,64*3/3,28=1,5 первое число
1.2*1.5=1.8 второе число
1.8*0.9=1,62 третье число
проверка
(1,5+1.8+1.62).3=4,92.3=1,64