A B and C can do a work in 15 hours to 12 hours and 20 hours respectiv

1.	A B and C can do a work in 15 hours to 12 hours and 20 hours respectively at 4 p.m. they start working together and after working for 2 hr A left the work and B left two hours before the completion of the work in what time the all work will be completed
Answer» Answer:7 HOURS 45 mins Step-by-step EXPLANATION:

A B and C can do a work in 15 hours to 12 hours and 20 hours respectively at 4 p.m. they start working together and after working for 2 hr A left the work and B left two hours before the completion of the work in what time the all work will be completed

Answer»

Answer:7 HOURS 45 mins

Step-by-step EXPLANATION:

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A B and C can do a work in 15 hours to 12 hours and 20 hours respectively at 4 p.m. they start working together and after working for 2 hr A left the work and B left two hours before the completion of the work in what time the all work will be completed ​

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A B and C can do a work in 15 hours to 12 hours and 20 hours respectively at 4 p.m. they start working together and after working for 2 hr A left the work and B left two hours before the completion of the work in what time the all work will be completed