Maths-
General
Easy

Question

The diameter of a metallic ball is 4.2 cm. What is the mass of the ball , if the density of the metal is 8.9 g per cubic cm ?

Hint:

We have given diameter of metallic ball .and the density of the metal is
We have to find the mass of the ball.

The correct answer is: = 2762.5511gm


    Step 1 of 1:
    We will first find the volume of the metallic ball
    V equals 4 over 3 pi r cubed
    table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell equals 4 over 3 pi left parenthesis 4.2 right parenthesis cubed end cell row cell equals 310.339 cm cubed end cell end table
    Now we know that
    Density = fraction numerator M a s s over denominator V o l u m e end fraction
    Put the value of density and volume in formula, we will get mass
    Density = fraction numerator M a s s over denominator V o l u m e end fraction
    8.9 = fraction numerator M a s s over denominator 310.399 end fraction
    Mass = 8.9 cross times 310.399gm
    = 2762.5511gm

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