Question

An amount of money invested trebled in 6 years. Find the rate of interest
earned.​

Answer 1

Answer with Step-by-step explanation:

Let the principal be a

Amount = 3a

Time = 6 years

SI = Amount - Principal

SI = 3a - a = 2a

SI = 2a

=> PRT/100 = 2a.

=> a *R *6 = 200a

=> R = 200a/6a

=> R = 33.3 %

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Answer 2

Answer:33 1/3 OR 33.33

Step-by-step explanation: As the money is invested we can take it as principal. But, the principal is not given so we will assume it as ₹100.

Amount=100*3 [An amount of money invested 'trebled '----]

Time=6 years[An amount of money invested trebled in '6 years']

Amount=P-Simple interest

Amount-P=simple interest

300-100=200

S.I.=P*R*T/100

200=100*R*6/100

200=R*6

200/6=R

100/3=R

'33 1/3'=R

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