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040. Find the cost of 15.5 KS
30 men can dig a ditch in 15 days. How long will 45 men take to dig it ?​

By Anna

040. Find the cost of 15.5 KS
30 men can dig a ditch in 15 days. How long will 45 men take to dig it ?​

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Anna

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solve the following linear inequalities graphically :2x-7y+9≥ 0
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