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Question

The slant height of a bucket is 45 cm and the radii of its top and bottom are 28 cm and 7 cm respectively. The curved surface area of the bucket is

(a) 4953 cm2        (b) 4952 cm2        (c) 4951 cm2        (d) 4950 cm2


Solution

(d) 4950 cm2 correct option. 

Slant Height (L) = 45 cm

Radius of the top of the bucket (R) = 28 cm

Radius of the bottom of the bucket (r) = 7 cm

Therefore,

CSA of the bucket = πL(R+r)=227×45(28+7)=227×45×35

22×45×357=346507=4950cm2

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