Question 6
Mr. Andi maintains two gardens namely A and B, where the grass grows at a rate of 1 cm every 4 and 5 days, respectively. The initial height of the grass for both gardens is 1 cm. He needs to mow the garden only if the grass reaches 6 cm in height, and that after each mowing session, the height of the grass will be reduced back to 1 cm. On the days that he has to mow only one garden, he earns 15 dollars per session, while on some days where he needs to mow two gardens in one day, he will get 10 dollars for each garden mowed. How much dollars will Mr. Andi get in one year?