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How mañy bullets can be made out of a cube of lead, whose edge measures 22 cm, each bullet being 2 cm in diameter? - CBSE Class 9 - Mathematics

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Question

How mañy bullets can be made out of a cube of lead, whose edge measures 22 cm, each bullet being 2 cm in diameter?

Solution

Cube edge= 22cm 

∴ Volume of cube=`(22)^3`

=`10648cm^3`

And,
Volume of each bullet =`4/3πr^3`

=`4/3×22/7×(2/2)^3`

=`4/3×22/7`

=`88/21cm^3`

∴No. of bullets=`"Volume of cube"/"Volume of bullet"`

=`10648/(88/21)=2541`

 

 

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APPEARS IN

 RD Sharma Solution for Mathematics for Class 9 by R D Sharma (2018-19 Session) (2018 to Current)
Chapter 21: Surface Areas and Volume of a Sphere
Ex.21.20 | Q: 5 | Page no. 20
Solution How mañy bullets can be made out of a cube of lead, whose edge measures 22 cm, each bullet being 2 cm in diameter? Concept: Volume of a Sphere.
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