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3 years ago

M is directly proportional to r2 When r=2, m=14 Work out the value of m when r=12

Mathematics

1 answer:

Genrish500 [490]3 years ago

8 0

we have M is durectly porpotional to r^2

so M=(k)r^2

and when r=2, m=14

so 14=(k)(2)^2

k=14/4 =7/2

so when r=12

m= (7/2)(12)^2 =(7/2)(144) = 504

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