The country's new asphalt paving machine can surface 1km of highway in 10h. A much older machine can…?
The country's new asphalt paving machine can surface 1km of highway in 10h. A much older machine can…?
The country's new asphalt paving machine can surface 1km of highway in 10h. A much older machine can surface 1km in 18h. How long will it take them to surface 21 km of highway if they start at opposite ends ands and work day and night?
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