3. The mass of 3 muffins and 4 doughnuts is 580 g.
The mass of the 3 muffins is 180 g.
The mass of each doughnut is the same.
What is the mass of each doughnut?
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A weight of 450 gram produces an extension of 3.5 cm in elastic string, find
(a). How much weight is required to produce an extension 1.75 CM.
(b). How much extension will be produced by 9 kg weight.
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