Question

33. Fatima and Zahira can do a piece of work in 12 days and 15
days respectively. If they work for alternate day and Fatima
starts the work first, then in how many days the work will be
completed?​

Answer 1

Step-by-step explanation:

Fatima=12 efficiency=60/12=5

Lcm=12,15=60

Zahira=15 efficiency=60/15=4

1stday 2nd day

Fatima zahira

5 + 4=9unit in 2 days

×6 ×6

54 units in 12 days

Remaining=6 unit in 12 6/9=12 2/3 days