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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

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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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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User Amiraslan
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8.3k points

1 Answer

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M=kr^3

160=k*4^3

2.5=k

M=2.5*2^3

=20

answered
User Nicolas Gimelli
by
8.2k points
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