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The thickness of a thatch roof covering should be at least ___________(a) 5 cm(b) 7 cm(c) 10 cm(d) 15 cmThe question was posed to me in unit test.My question comes from Roof Coverings for Pitched Roofs topic in section Roofing Materials of Construction & Building Materials |
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Answer» The correct OPTION is (d) 15 cm |
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