69 + 40= 109 109+50= 159 159+60= 219 219+70= 289 289+80= 369
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One alloy of steel contains 74% Iron and 26% carbon. Another alloy contains 81% Iron and 12% carbon. Later, they are mixed, so that the mixture contains...
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A mixture contains ‘X’ liter milk and ‘Y’ liter water. If 30 liter of mixture is taken out and replaced with water, then the quantity of milk an...
