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CBSE Class 9 Answered

A bead is made up of metal of radius 2 cm. If the density of the metal is 10.5 gm/cm3, calculate the mass of the bead.
Asked by Topperlearning User | 24 Oct, 2017, 01:57: PM
Expert Answer

Radius (r) = 2 cm

Let V be the volume of metallic sphere.

 

begin mathsize 12px style straight V space equals space 4 over 3 πr cubed
straight V space equals space 4 over 3 cross times 22 over 7 cross times 2 cubed space cm cubed end style

Mass of 1 cm3 of metal = 10.5 gm

Mass of begin mathsize 12px style 4 over 3 cross times 22 over 7 cross times 2 cubed space cm cubed end style of metal

begin mathsize 12px style 10.5 cross times 4 over 3 cross times 22 over 7 cross times 2 cubed space gm
equals 352 space gm end style

Answered by | 24 Oct, 2017, 03:57: PM
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