Brajen can paint a wall red in 10 hrs while Ballari can whitewash the wall completely in 12 hrs. If Brajen and Ballari work alternately for an hour each starting when the wall has just cement on it till when it is completely painted red, how many hours will it take to paint the entire wall red?

Brajen can paint a wall red in 10 hrs while Ballari can whitewash the

1.	Brajen can paint a wall red in 10 hrs while Ballari can whitewash the wall completely in 12 hrs. If Brajen and Ballari work alternately for an hour each starting when the wall has just cement on it till when it is completely painted red, how many hours will it take to paint the entire wall red?
A.	109
B.	108
C.	120
D.	110
Answer» B. 108

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Brajen can paint a wall red in 10 hrs while Ballari can whitewash the wall completely in 12 hrs. If Brajen and Ballari work alternately for an hour each starting when the wall has just cement on it till when it is completely painted red, how many hours will it take to paint the entire wall red?

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