The recycling plant processes 480 tons of glass per day.
Step-by-step explanation:
Quantity of glass recycled each minute = 
We know that;
1 hour = 60 minutes
Therefore;
Quantity of glass recycled in one hour = 
1 day = 24 hours
Quantity of glass recycled in 24 hours = 24*20 = 480 tons
The recycling plant processes 480 tons of glass per day.
Keywords: multiplication, fraction
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Answer:
111.625
Step-by-step explanation:
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C = # of carpenter hrs , b = # of blacksmith hrs
c + b = 30...c = 30 - b
20c + 25b = 690
20(30 - b) + 25b = 690
600 - 20b + 25b = 690
-20b + 25b = 690 - 600
5b = 90
b = 90/5
b = 18 <== hrs worked as blacksmith
c + b = 30
c + 18 = 30
c = 30 - 18
c = 12 <== hrs worked as carpenter