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Find the radius of sphere whose …

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Find the radius of sphere whose surface area is 154 cm square.

    • Posted by Hetvi Patel 2 years, 4 months ago

    CBSE > Class 09 > Mathematics
    • 4 answers

    Preeti Dabral 2 years, 4 months ago

    Let the radius of the sphere be r cm.
    Surface area = 154 cm2
    ⇒ 4πr2 = 154
    ⇒ 4×227×r2=154
    ⇒ r2=154×74×22=494
    ⇒ r = √494=72
    ⇒ r = 3.5 cm
    ∴ the radius of the sphere is 3.5 cm.

    0Thank You

    Smriti Gupta 2 years, 3 months ago

    3.5

    0Thank You

    Siddhi Gupta 2 years, 4 months ago

    S.a=154 4πr²=154 r²=154 x 7\4 x 22 r=√49/7 r=7/2 r=3.5cm Radius of sphere is 3.5 cm

    0Thank You

    Shubh Goyal 2 years, 4 months ago

    √10.5=3.24

    0Thank You

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