A cleaning company employs 42 sweepers to clean a building in 25 days. 10 days later, 12 sweepers left the job. If the cleaning work is to be finished in 10 days, how many more cleaning workers need to be hired?A. 30B. 32C. 33D. 21

A cleaning company employs 42 sweepers to clean a building in 25 days.

1.	A cleaning company employs 42 sweepers to clean a building in 25 days. 10 days later, 12 sweepers left the job. If the cleaning work is to be finished in 10 days, how many more cleaning workers need to be hired?A. 30B. 32C. 33D. 21
A.	C
B.	D
C.	A
D.	B
Answer» B. D

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A cleaning company employs 42 sweepers to clean a building in 25 days. 10 days later, 12 sweepers left the job. If the cleaning work is to be finished in 10 days, how many more cleaning workers need to be hired?A. 30B. 32C. 33D. 21

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