Предмет: Математика, автор: makenovazamat

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Автор ответа: toris2016
0

Ответ:

Объём второго цилиндра равен 90 м³

Пошаговое объяснение:

  • Объём цилиндра вычисляется по формуле:

V = πR²h

где R - радиус цилиндра

h - высота цилиндра

Тогда объём первого цилиндра:

V₁ = πR₁²h₁, по условию  V₁ = 120 м³

Объём второго цилиндра:

V₂ = πR₂²h₂

Так как по условию R₂ = R₁/2, а h₂ = 3h₁, то

V_2 =\pi (\frac{R_1}{2} )^{2} *3h_1=\pi *\frac{1}{4} R_1^{2} *3h_1=\frac{3}{4} \pi R_1^{2} h_1=\\\\=\frac{3}{4}*V_1=\frac{3}{4}*120=90

Объём второго цилиндра равен 90 м³

Автор ответа: dyexfnf
0

Ответ:

Пошаговое объяснение:

Объем  первого цилиндра равен : V1 = πr²h

Так как согласно условия высота второго цилиндра в 3 раза больше, то она равна 3h, а радиус в 2 раза меньше, то он равен r/2, тогда объем второго цилиндра равен:

V2 = π(r/2)² * 3h = π *  r²/4 * 3h = 3/4π * r² * h  

Так как объем первого 120 = πr²h, то объем второго будет:

V2 = 3/4 * 120 = 120 : 4 * 3 = 90 м³

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