In 7 days a machine cleans
5.6 × 10⁷ kg of iron ore. How much iron ore will it clean in 45 days
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Answer:
7 days ...............5.6*10power7 kg
1 day...............5.6*10power7/7 = 0.8*10power7
45 days ...............0.8*10power7 *45
=36*10power7 kg iron ores
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