A and B alone can complete a piece of work in 9 days and 12 days, respectively. In how many days will the work be completed if they work on alternate days starting with A?
A531
B1131
C1065
D1041
Answer:
1041
Read Explanation:
A alone 9 days
B alone 12 days
total work is the LCM of 9 and 12 = 36
one day work of A is 36/9=4
one day work of B is 36/12=3
for alternate work starting A is
4,3,4,3,4,3,4,3,4,3...
after 10 days total work should be 35 work
next day will be A . one day work of A is 4 for one work it is 1/4 days