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The circumference of a circle varies directly as its diameter. if the circumference of a circle having a diameter of 7 cm is 7π cm, what is the circumference of the circle whose diameter is 10 cm? 15 cm? 18 cm? 20 cm? ​

Answers

  • Réponse publiée par: nicole8678

    10π cm, 15π cm, 18π cm, 20π cm

    Step-by-step explanation:

    C= πd

  • Réponse publiée par: kambalpandesal23
    EQUATION: C = kd

    7 = k (7)

    7/7 = k 7/7

    1 = k

    C = (1)(20)

    C = 20

    ANSWER: 20 cm
  • Réponse publiée par: enrica11
    Let C= circumference of the circle
    d= diameter of the circle

    (a) since c varies directly with d
    C=kd

    (b) Given C=7π and d=7, substituting it to the equation on (a) gives us:
    (7π)=k(7)
    k=7π/7
    k=π

    (c) to get the value of C we substitute d with values 10, 15, 18, 20 to the formula C=πd, therefore:

    C=10π if d=10
    C=15π if d=15
    C=18π if d=18
    C=20π if d=20
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The circumference of a circle varies directly as its diameter. if the circumference of a circle havi...