If a 105 cm long tube light of outer circumference 11 cm is made of glass of thickness 0.2cm , then how many cubic centimetres of glass will be needed to make 5 such tube lights?
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16
Answer:
refer to the attachment....xD...
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11
Answer:
outer radius be R cm, inner radius be (r) R-2
see the attached pic
volume of 5 tube light= 1089 cu cm
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