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The diameter of a spherical ball is 21 cm. How much leather is required to prepare5such balls. |
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Answer» d=21 cm r= d/2= 21/2cm surface area of 1 sphere= 4*22/7*r*r = 4*22/7*21/2*21/2 =22*3*21 =1386cm² now for 5 balls = 5*1386 cm³ =6930 cm² of leather is required |
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