tyanarihanna tyanarihanna

05-03-2019
Mathematics

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M is directly proportional to r^3 when r=4 ,m=160 .work out the value of m when r=2

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bnbbkpoole bnbbkpoole

06-03-2019

M=kr^3

160=k*4^3

2.5=k

M=2.5*2^3

=20

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