The compound interest on a sum of money in 2 years are Rs5460 and Rs 12066.60 respectively find the diffrence between principal and compound interest of 3 years

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years