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A canal of width \(1 \ m\) is constructed all along inside the field which is \(24 \ m\) long and \(15 \ m\) wide. Find:
(a) The area of the canal \(=\) \(m^2\)
(b) The cost of constructing the canal at the rate of \(₹12\) per \(sq.m = ₹\)
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