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2(7Pr)= 420 Please help me I know r =3 but don’t know how to get there.

2(7Pr)= 420 Please help me I know r =3 but don’t know how to get there.
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18 votes
2(7Pr)= 420

Please help me I know r =3 but don’t know how to get there.

User Maxime Beugnet
by
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1 Answer

8 votes
14Pr =420
420/14 = 30
Pr = 30

id assume P is 10 to do 30/10 = 3??
User NoName
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