11) The radius of a circular park is 63 m. Find the cost of fencing it at Rs. 12 per meter. (A) Rs. 4,752 (B) Rs. 7,452 (C)

Question

11) The radius of a circular park is 63 m. Find the cost of fencing it at Rs. 12 per meter.
(A) Rs. 4,752
(B) Rs. 7,452
(C) Rs. 4,572
(D) Rs. 4,672​

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Maya 3 weeks 2021-10-01T19:36:36+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-10-01T19:37:58+00:00

    Answer:

    (A) Rs. 4,752

    The cost of fencing is Rs. 4,752

    Step-by-step explanation:

    Given:

    • The radius of a circular park = 63 m

    • Rate = Rs. 12 per meter

    To Find:

    • The cost of fencing

    Solution :

    ⇒ Radius (r) = 63 m

    Find the Circumference:

    Circumference of the circle = 2 π r

    ⇒ 2 × 22 / 7 × 63

    ⇒ 44 / 7 × 63

    ⇒ 44 × 9

    396 m

    Circumference of the circle = 396m

    ____________________________

    Find the cost of fencing:

    Circumference × Rate

    ⇒ 396 × 12

    ⇒ 4,752

    Therefore,

    (A) Rs. 4,752

    The cost of fencing is Rs. 4,752

    0
    2021-10-01T19:38:03+00:00

    Radius of circular park = 63 m.

    Circumference = 2*π*radius

    = 2*22/7*63

    = 44*9

    = 396 m.

    Now,

    Rate of fencing the circumference of the circular park = Re.12 per metre

    So,

    the cost of fencing = Circumference*Rate

    = 396 * 12

    = Re.4752.

    Hope this helps…

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