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Deepak Bora
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Asked: 2020-08-29T22:42:45+05:30 In:

The volume of a sphere is 4851 cm³ . Find its curved surface area

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In this problem need to use the relation between volume and surface area relation of sphere.

Question number 14 from RS Aggarwal book page number 827, exercise 17D, chapter volume and surface area of solid.

cbse class 10thexercise 17dncert class 10thrs aggarwalvolume and surface area of solid
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    1. Newbie

      Let radius of sphere be ‘r‘ cm. Then

      Volume of sphere  =34​πr^3=4851 cm^3

      ⇒r^3=4×224851×7×3
      ​⇒r^3=8441×21
      ​⇒r=38441×21​​=221​=10.5 cm

      Therefore, surface area  =4πr^2=4×722​×10.5×10.5=1386 cm^2

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