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The radii of circular ends of …

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The radii of circular ends of a bucket are 5.5  cm and 15.5 cm and its height is 24 cm. Find the surface area of the bucket. 

  • 1 answers

Rashmi Bajpayee 7 years, 2 months ago

Slant height (l) = {h2 + (R - r)2)}1/2

                           = {242 + (15.5 - 5.5)2 }1/2

                           = {576 + 100}1/2

                           = 26 cm

CSA of bucket = πl(R + r) + πr2

     = 22/7{26(15.5 + 5.5) + (5.5)2}

     = 22/7{30.25 + 546}

     = 22/7 × 576.35

     = 1811.07 sq. cm

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