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[" sheer used at the top is made of iron sheet "4m" wide.If the dimensions of the tank "],[" A tank open at the top is made of iron sheet "4m" wide.If the dimensions of the tank "],[8m times6m," find the cost of iron sheet at "717.50" per metre."],[" Three equal cobes are placed adiacently in a row Find the ratio of total surfice are "]

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