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Please can you solve this

Asked by sharma.vipul74 14th March 2009, 1:48 PM
Answered by Expert
Answer:

Let the thickness of the open pipe be t.

Total surface area,A=4620=115.5+2π(7)(R+r)...(1)

Area of base,A=π(R+r)t=115.5...(2)

Using (1) and (2),

4620=115.5+2(7)(115.5)/t

t=0.36 cm

Answered by Expert 29th March 2009, 6:55 PM
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