Solve the problem.One conveyor belt can move 1000 boxes in 12 minutes. Another can move 1000 boxes in 11 minutes. If another conveyor belt is added and all three are used, the boxes are moved in 3 minutes. How long would it take the third conveyor belt alone to do the same job?
A. 
min
B. 6
min
C. 1
min
D. 
min
Answer: B
Mathematics
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What will be an ideal response?
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A. 
B. 
C. 
D. 
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A. Yes B. No
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