P, R and S are three persons with ages 26 years, 27 years and 28 years respectively. In what ratio must they invest money at 10% per annum compounded yearly so that each gets same sum at the age of their retirement ?
- 100 : 110 : 121
- 80 : 100 : 99
- 100 : 121 : 132
- 89 : 95 : 100
