
Answer:
2.56 months
Step-by-step explanation:
When does balance of boat = balance of savings
boat balance = 3300 - 300 m    m = months
savings balance = 1000 + 600m  m = months
when are they equal ?
3300 - 300 m  =   1000 + 600 m
2300 = 900 m
m = 2.56 months  ( 3 months )
Check : Â in 3 months boat balance = 2400
      savings = 1000 + 600 + 600 + 600 = 2800