8. A certain sum of money doubles itself at simple interest in 8 years

1.	8. A certain sum of money doubles itself at simple interest in 8 years. In how many years will it be three times at the same time
Answer» Answer: 9.53yrs Step-by-step EXPLANATION: LET SUM be x t=8 yrs p=2x si=2x-x=x r=si100/tp 100x/16x 6.25rate PER annum since RATE is same, t=si100/rt 10000x/625*2x =200/21 =9.53

8. A certain sum of money doubles itself at simple interest in 8 years. In how many years will it be three times at the same time

Answer»

Answer:

9.53yrs

Step-by-step EXPLANATION:

t=8 yrs

p=2x

si=2x-x=x

r=si*100/t*p

100x/16x

6.25rate PER annum

since RATE is same,

t=si*100/r*t

10000x/625*2x

=200/21

=9.53