AshBorg
02.04.2020 •
Mathematics
Given a sphere with a surface area of 256pi square units, find its EXACT volume.
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Ответ:
volume of the sphere = 2143.57units³
Step-by-step explanation:
Given that the area of a sphere = 256πunits²
volume of the sphere = ?
recall that the area of a sphere = 4πr²
256π = 4 πr²
divide both sides by 4π
256π/4π = 4πr²/4π
64 = r²
squaring both sides
r = √64
r = 8units
now to calculate the volume of the sphere,
recall that
volume of the sphere = 4π r³/3
volume of the sphere = 4π 8³/3
volume of the sphere = 4π 512/3
volume of the sphere = 4 × 3.14 × 170.667
volume of the sphere = 2143.57units³
Ответ:
1520.5 cm³
Step-by-step explanation:
Volume formula for cylinder: V = πr²×h
Radius = 11 ÷ 2
= 5.5cm
Volume = π × 5.5² × 16
=1520.5cm³