Question

an amount of money invested trebled in 6 years. find the rate of interest earned

Answer 1

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 %

Answer 2

Answer:

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

Hope it will help you