A sum of money doubles itself in 5 years at a certain rate of interest. How many years will it take for a certain sum to become 3 times itself at the same rate of interest?
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Answer:
10 years
Step-by-step explanation:
Letsum=xthenS.I=x
rate=
P×T
100×SI
=
x×5
100×x
=20%
Nowforcasesecondsum=x,SI=2x
time=
x×20
2x×100
=10years
Nowforcasesecondsum=x,SI=2x
time=
x×20
2x×100
=10years
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